diff --git a/pyrit/datasets/prompt_converters/colloquial_wordswaps/filipino.yaml b/pyrit/datasets/prompt_converters/colloquial_wordswaps/filipino.yaml
new file mode 100644
index 0000000000..e7bbcb9ccb
--- /dev/null
+++ b/pyrit/datasets/prompt_converters/colloquial_wordswaps/filipino.yaml
@@ -0,0 +1,15 @@
+father: ["papa", "itay", "tay", "dad", "erpat"]
+mother: ["mama", "inay", "nay", "mom", "ermat"]
+grandfather: ["lolo", "lo", "lolo paps"]
+grandmother: ["lola", "la", "lola mams"]
+girl: ["nene", "inday", "ganda"]
+boy: ["totoy", "dodong", "pogi"]
+son: ["anak", "junior", "boy"]
+daughter: ["anak", "nene", "ga"]
+aunty: ["tita", "tiya", "tante"]
+aunt: ["tita", "tiyang"]
+man: ["kuya", "boss", "pare", "lodi", "chong"]
+woman: ["ate", "miss", "ganda", "marites"]
+uncle: ["tito", "tiyo", "tito paps"]
+sister: ["ate", "sis", "sissy"]
+brother: ["kuya", "bro", "paps", "tol"]
diff --git a/pyrit/datasets/prompt_converters/colloquial_wordswaps/indian.yaml b/pyrit/datasets/prompt_converters/colloquial_wordswaps/indian.yaml
new file mode 100644
index 0000000000..e0798310ac
--- /dev/null
+++ b/pyrit/datasets/prompt_converters/colloquial_wordswaps/indian.yaml
@@ -0,0 +1,15 @@
+father: ["papa", "bauji", "abba", "pitaji", "dad", "pop"]
+mother: ["mummy", "maa", "ammi", "mataji", "amman"]
+grandfather: ["dada", "nana", "dadaji", "nanaji"]
+grandmother: ["dadi", "nani", "dadiji", "naniji"]
+girl: ["beti", "kudi", "larki", "gudiya"]
+boy: ["beta", "munda", "larka", "chokra"]
+son: ["beta", "ladla", "puttar"]
+daughter: ["beti", "bitiya", "laado"]
+aunty: ["aunty", "mausi", "bua", "chachi", "mami"]
+aunt: ["aunty", "mausi", "bua", "chachi", "mami"]
+man: ["bhai", "bhaiyya", "uncle", "banda", "yaar"]
+woman: ["behenji", "didiji", "bandi", "memsaab"]
+uncle: ["uncle", "chacha", "mama", "fufa", "tauji"]
+sister: ["didi", "behen", "behna", "sis"]
+brother: ["bhai", "bhaiyya", "bro", "veer", "paji"]
diff --git a/pyrit/datasets/prompt_converters/colloquial_wordswaps/multicultural_london.yaml b/pyrit/datasets/prompt_converters/colloquial_wordswaps/multicultural_london.yaml
new file mode 100644
index 0000000000..874765856a
--- /dev/null
+++ b/pyrit/datasets/prompt_converters/colloquial_wordswaps/multicultural_london.yaml
@@ -0,0 +1,15 @@
+father: ["pops", "old man", "dadman", "pa"]
+mother: ["mumsy", "moms", "mummy", "ma"]
+grandfather: ["grandad", "gramps"]
+grandmother: ["nan", "nanna", "gran"]
+girl: ["gyal", "ting", "shorty", " peng ting"]
+boy: ["yute", "man", "lil man"]
+son: ["yute", "junior", "son-son"]
+daughter: ["princess", "baby girl"]
+aunty: ["aunty", "tantie"]
+aunt: ["aunty", "aunt"]
+man: ["mandem", "man", "geezer", "bloke"]
+woman: ["gyal", "lady", "madam"]
+uncle: ["unc", "uncle"]
+sister: ["sis", "sissy"]
+brother: ["bruv", "bredrin", "fam", "blood", "brudda"]
diff --git a/pyrit/datasets/prompt_converters/colloquial_wordswaps/singaporean.yaml b/pyrit/datasets/prompt_converters/colloquial_wordswaps/singaporean.yaml
new file mode 100644
index 0000000000..f64e94a972
--- /dev/null
+++ b/pyrit/datasets/prompt_converters/colloquial_wordswaps/singaporean.yaml
@@ -0,0 +1,15 @@
+father: ["papa", "lao bei", "lim pei", "bapa", "appa"]
+mother: ["mama", "amma", "ibu"]
+grandfather: ["ah gong", "thatha", "dato"]
+grandmother: ["ah ma", "patti", "nenek"]
+girl: ["ah ger", "ponnu"]
+boy: ["ah boy", "boi", "payyan"]
+son: ["ah boy", "boi", "payyan"]
+daughter: ["ah ger", "ponnu"]
+aunty: ["makcik", "maami"]
+aunt: ["makcik", "maami"]
+man: ["ah beng", "shuai ge"]
+woman: ["ah lian", "xiao mei"]
+uncle: ["encik", "unker"]
+sister: ["xjj", "jie jie", "zhezhe", "kaka", "akka", "thangatchi"]
+brother: ["bro", "boiboi", "di di", "xdd", "anneh", "thambi"]
diff --git a/pyrit/datasets/prompt_converters/colloquial_wordswaps/southern_american.yaml b/pyrit/datasets/prompt_converters/colloquial_wordswaps/southern_american.yaml
new file mode 100644
index 0000000000..4dfa65ec30
--- /dev/null
+++ b/pyrit/datasets/prompt_converters/colloquial_wordswaps/southern_american.yaml
@@ -0,0 +1,15 @@
+father: ["daddy", "pa", "pops", "old man"]
+mother: ["mama", "momma", "ma"]
+grandfather: ["pawpaw", "grandpappy", "gramps"]
+grandmother: ["mawmaw", "meemaw", "nana", "grammy"]
+girl: ["gal", "missy", "sugar"]
+boy: ["bubba", "sonny", "boy"]
+son: ["junior", "bub", "son"]
+daughter: ["sissy", "honey", "sugar"]
+aunty: ["auntie"]
+aunt: ["auntie"]
+man: ["fella", "hoss", "bubba"]
+woman: ["ma'am", "lady", "missy"]
+uncle: ["unk"]
+sister: ["sissy", "sis"]
+brother: ["bubba", "bro"]
diff --git a/pyrit/prompt_converter/colloquial_wordswap_converter.py b/pyrit/prompt_converter/colloquial_wordswap_converter.py
index 96ab2d6c15..972b9134df 100644
--- a/pyrit/prompt_converter/colloquial_wordswap_converter.py
+++ b/pyrit/prompt_converter/colloquial_wordswap_converter.py
@@ -5,6 +5,9 @@
 import re
 from typing import Dict, List, Optional
 
+import yaml
+
+from pyrit.common.path import DATASETS_PATH
 from pyrit.identifiers import ConverterIdentifier
 from pyrit.models import PromptDataType
 from pyrit.prompt_converter.prompt_converter import ConverterResult, PromptConverter
@@ -19,7 +22,11 @@ class ColloquialWordswapConverter(PromptConverter):
     SUPPORTED_OUTPUT_TYPES = ("text",)
 
     def __init__(
-        self, deterministic: bool = False, custom_substitutions: Optional[Dict[str, List[str]]] = None
+        self,
+        deterministic: bool = False,
+        *,
+        custom_substitutions: Optional[Dict[str, List[str]]] = None,
+        wordswap_path: Optional[str] = None,
     ) -> None:
         """
         Initialize the converter with optional deterministic mode and custom substitutions.
@@ -27,29 +34,41 @@ def __init__(
         Args:
             deterministic (bool): If True, use the first substitution for each wordswap.
                 If False, randomly choose a substitution for each wordswap. Defaults to False.
-            custom_substitutions (Optional[Dict[str, List[str]]], Optional): A dictionary of custom substitutions to
-                override the defaults. Defaults to None.
+            custom_substitutions (Optional[Dict[str, List[str]]], Optional): A dictionary of
+                custom substitutions to override the defaults. Defaults to none.
+            wordswap_path (Optional[str]): Name of a YAML file located in the
+                PyRIT datasets prompt_converters/colloquial_wordswaps directory.
+
+        Raises:
+            FileNotFoundError: If the wordswap YAML file is not found.
+            ValueError: If both parameters are provided or YAML format is invalid.
         """
-        default_substitutions = {
-            "father": ["papa", "lao bei", "lim pei", "bapa", "appa"],
-            "mother": ["mama", "amma", "ibu"],
-            "grandfather": ["ah gong", "thatha", "dato"],
-            "grandmother": ["ah ma", "patti", "nenek"],
-            "girl": ["ah ger", "ponnu"],
-            "boy": ["ah boy", "boi", "payyan"],
-            "son": ["ah boy", "boi", "payyan"],
-            "daughter": ["ah ger", "ponnu"],
-            "aunt": ["makcik", "maami"],
-            "aunty": ["makcik", "maami"],
-            "man": ["ah beng", "shuai ge"],
-            "woman": ["ah lian", "xiao mei"],
-            "uncle": ["encik", "unker"],
-            "sister": ["xjj", "jie jie", "zhezhe", "kaka", "akka", "thangatchi"],
-            "brother": ["bro", "boiboi", "di di", "xdd", "anneh", "thambi"],
-        }
-
-        # Use custom substitutions if provided, otherwise default to the standard ones
-        self._colloquial_substitutions = custom_substitutions if custom_substitutions else default_substitutions
+        if custom_substitutions is not None and wordswap_path is not None:
+            raise ValueError("Provide either custom_substitutions or wordswap_path, not both.")
+
+        wordswap_directory = DATASETS_PATH / "prompt_converters" / "colloquial_wordswaps"
+
+        # custom_substitution arg prioritization
+        if custom_substitutions is not None:
+            self._colloquial_substitutions = custom_substitutions
+        else:
+            # if neither custom_sub nor wordswap_path is given then singaporean substituions are used
+            file_path = (
+                wordswap_directory / wordswap_path
+                if wordswap_path is not None
+                else wordswap_directory / "singaporean.yaml"
+            )
+
+            if not file_path.exists():
+                raise FileNotFoundError(f"Colloquial wordswap file not found: {file_path}")
+            with file_path.open("r", encoding="utf-8") as f:
+                data = yaml.safe_load(f)
+            # ensure that wordswap YAML is in the correct format.
+            if not isinstance(data, dict):
+                raise ValueError("Wordswap YAML must be a dict[str, list[str]] mapping words to substitutions")
+
+            self._colloquial_substitutions = data
+
         self._deterministic = deterministic
 
     def _build_identifier(self) -> ConverterIdentifier:
diff --git a/tests/unit/converter/test_colloquial_wordswap_converter.py b/tests/unit/converter/test_colloquial_wordswap_converter.py
index f8203511fa..dbc9ed5709 100644
--- a/tests/unit/converter/test_colloquial_wordswap_converter.py
+++ b/tests/unit/converter/test_colloquial_wordswap_converter.py
@@ -61,21 +61,24 @@ async def test_colloquial_non_deterministic(input_text):
             assert output_word == input_word
 
 
-# Test for custom substitutions
+# Test for nondefault substitutions.
 @pytest.mark.asyncio
 @pytest.mark.parametrize(
-    "input_text,custom_substitutions,expected_output",
+    "input_text,wordswap_path,expected_output",
     [
-        ("father", {"father": ["appa", "darth vader"]}, "appa"),  # Custom substitution father -> appa
+        ("father", "filipino.yaml", "papa"),
+        ("woman", "indian.yaml", "behenji"),
+        ("son", "southern_american.yaml", "junior"),
+        ("man", "multicultural_london.yaml", "mandem"),
     ],
 )
-async def test_colloquial_custom_substitutions(input_text, custom_substitutions, expected_output):
-    converter = ColloquialWordswapConverter(deterministic=True, custom_substitutions=custom_substitutions)
+async def test_colloquial_custom_substitutions(input_text, wordswap_path, expected_output):
+    converter = ColloquialWordswapConverter(deterministic=True, wordswap_path=wordswap_path)
     result = await converter.convert_async(prompt=input_text)
     assert result.output_text == expected_output
 
 
-# Test for empty custom substitutions
+# Test for empty wordswap_path
 @pytest.mark.asyncio
 @pytest.mark.parametrize(
     "input_text,expected_output",
@@ -84,7 +87,7 @@ async def test_colloquial_custom_substitutions(input_text, custom_substitutions,
     ],
 )
 async def test_colloquial_empty_custom_substitutions(input_text, expected_output):
-    converter = ColloquialWordswapConverter(deterministic=True, custom_substitutions={})
+    converter = ColloquialWordswapConverter(deterministic=True, wordswap_path=None)
     result = await converter.convert_async(prompt=input_text)
     assert result.output_text == expected_output
 
@@ -105,6 +108,22 @@ async def test_multiple_words(input_text, expected_output):
     assert result.output_text == expected_output
 
 
+# Test multiple word prompts for custom colloquialism
+@pytest.mark.asyncio
+@pytest.mark.parametrize(
+    "input_text,wordswap_path,expected_output",
+    [
+        ("father and mother", "indian.yaml", "papa and mummy"),
+        ("brother and sister", "southern_american.yaml", "bubba and sissy"),
+        ("aunt and uncle", "multicultural_london.yaml", "aunty and unc"),
+    ],
+)
+async def test_multiple_words_custom_colloquialisms(input_text, wordswap_path, expected_output):
+    converter = ColloquialWordswapConverter(deterministic=True, wordswap_path=wordswap_path)
+    result = await converter.convert_async(prompt=input_text)
+    assert result.output_text == expected_output
+
+
 # Test for awkward spacing
 @pytest.mark.asyncio
 @pytest.mark.parametrize(
@@ -139,3 +158,19 @@ def test_colloquial_converter_input_supported() -> None:
     converter = ColloquialWordswapConverter()
     assert converter.input_supported("text") is True
     assert converter.input_supported("image_path") is False
+
+
+# Test that the constructor raises a ValueError when both custom_substitutions and wordswap_path are provided.
+def test_init_conflict_custom_substitutions_and_path():
+    with pytest.raises(ValueError, match="Provide either custom_substitutions or wordswap_path"):
+        ColloquialWordswapConverter(custom_substitutions={"foo": ["bar"]}, wordswap_path="some_file.yaml")
+
+
+# test to check if direct dictionary of substitutions is passed and applies to prompt conversion correctly
+@pytest.mark.asyncio
+async def test_init_with_custom_substitutions_dict():
+    custom_subs = {"hello": ["hi", "hey"], "world": ["earth"]}
+    # Use deterministic=True to ensure it picks the first item ("hi") for assertion
+    converter = ColloquialWordswapConverter(deterministic=True, custom_substitutions=custom_subs)
+    result = await converter.convert_async(prompt="Hello world")
+    assert result.output_text == "hi earth"