diff --git a/crates/lib-dialects/src/ansi.rs b/crates/lib-dialects/src/ansi.rs
index 3de1387e8..002c2a2c2 100644
--- a/crates/lib-dialects/src/ansi.rs
+++ b/crates/lib-dialects/src/ansi.rs
@@ -356,15 +356,18 @@ pub fn raw_dialect() -> Dialect {
                 let pattern = reserved_keywords.iter().join("|");
                 let anti_template = format!("^({pattern})$");
 
-                RegexParser::new("[A-Z0-9_]*[A-Z][A-Z0-9_]*", SyntaxKind::NakedIdentifier)
-                    .anti_template(&anti_template)
-                    .to_matchable()
+                RegexParser::new(
+                    "[\\p{L}\\p{N}_]*[\\p{L}][\\p{L}\\p{N}_]*",
+                    SyntaxKind::NakedIdentifier,
+                )
+                .anti_template(&anti_template)
+                .to_matchable()
             })
             .into(),
         ),
         (
             "ParameterNameSegment".into(),
-            RegexParser::new(r#"\"?[A-Z][A-Z0-9_]*\"?"#, SyntaxKind::Parameter)
+            RegexParser::new(r#"\"?[\p{L}][\p{L}\p{N}_]*\"?"#, SyntaxKind::Parameter)
                 .to_matchable()
                 .into(),
         ),
@@ -383,7 +386,7 @@ pub fn raw_dialect() -> Dialect {
                 let anti_template = format!("^({})$", "NOT");
 
                 one_of(vec![
-                    RegexParser::new("[A-Z_][A-Z0-9_]*", SyntaxKind::DataTypeIdentifier)
+                    RegexParser::new("[\\p{L}_][\\p{L}\\p{N}_]*", SyntaxKind::DataTypeIdentifier)
                         .anti_template(&anti_template)
                         .to_matchable(),
                     Ref::new("SingleIdentifierGrammar")
@@ -5370,7 +5373,7 @@ fn lexer_matchers() -> Vec<Matcher> {
         Matcher::string("end_curly_bracket", "}", SyntaxKind::EndCurlyBracket),
         Matcher::string("colon", ":", SyntaxKind::Colon),
         Matcher::string("semicolon", ";", SyntaxKind::Semicolon),
-        Matcher::regex("word", "[0-9a-zA-Z_]+", SyntaxKind::Word),
+        Matcher::regex("word", "[\\p{L}\\p{N}_]+", SyntaxKind::Word),
     ]
 }
 
diff --git a/crates/lib-dialects/src/postgres.rs b/crates/lib-dialects/src/postgres.rs
index bbac58992..26cec7d19 100644
--- a/crates/lib-dialects/src/postgres.rs
+++ b/crates/lib-dialects/src/postgres.rs
@@ -105,7 +105,7 @@ pub fn raw_dialect() -> Dialect {
             SyntaxKind::SingleQuote,
         ),
         Matcher::regex("double_quote", r#"(?s)".+?""#, SyntaxKind::DoubleQuote),
-        Matcher::regex("word", r"[a-zA-Z_][0-9a-zA-Z_$]*", SyntaxKind::Word),
+        Matcher::regex("word", r"[\p{L}_][\p{L}\p{N}_$]*", SyntaxKind::Word),
     ]);
 
     let keywords = postgres_keywords();
@@ -402,7 +402,7 @@ pub fn raw_dialect() -> Dialect {
                 let anti_template = format!("^({pattern})$");
 
                 RegexParser::new(
-                    r"([A-Z_]+|[0-9]+[A-Z_$])[A-Z0-9_$]*",
+                    r"([\p{L}_]+|[\p{N}]+[\p{L}_$])[\p{L}\p{N}_$]*",
                     SyntaxKind::NakedIdentifier,
                 )
                 .anti_template(&anti_template)
@@ -412,15 +412,21 @@ pub fn raw_dialect() -> Dialect {
         ),
         (
             "ParameterNameSegment".into(),
-            RegexParser::new(r#"[A-Z_][A-Z0-9_$]*|\"[^\"]*\""#, SyntaxKind::Parameter)
-                .to_matchable()
-                .into(),
+            RegexParser::new(
+                r#"[\p{L}_][\p{L}\p{N}_$]*|\"[^\"]*\""#,
+                SyntaxKind::Parameter,
+            )
+            .to_matchable()
+            .into(),
         ),
         (
             "FunctionNameIdentifierSegment".into(),
-            RegexParser::new(r"[A-Z_][A-Z0-9_$]*", SyntaxKind::FunctionNameIdentifier)
-                .to_matchable()
-                .into(),
+            RegexParser::new(
+                r"[\p{L}_][\p{L}\p{N}_$]*",
+                SyntaxKind::FunctionNameIdentifier,
+            )
+            .to_matchable()
+            .into(),
         ),
         (
             "FunctionContentsExpressionGrammar".into(),
diff --git a/crates/lib-dialects/test/fixtures/dialects/ansi/sqruff/unicode_identifiers.sql b/crates/lib-dialects/test/fixtures/dialects/ansi/sqruff/unicode_identifiers.sql
new file mode 100644
index 000000000..420957387
--- /dev/null
+++ b/crates/lib-dialects/test/fixtures/dialects/ansi/sqruff/unicode_identifiers.sql
@@ -0,0 +1,7 @@
+SELECT 日本語 FROM テーブル;
+
+SELECT 表1.列1 FROM 表1;
+
+SELECT café FROM naïve_table;
+
+SELECT über, straße FROM données;
diff --git a/crates/lib-dialects/test/fixtures/dialects/ansi/sqruff/unicode_identifiers.yml b/crates/lib-dialects/test/fixtures/dialects/ansi/sqruff/unicode_identifiers.yml
new file mode 100644
index 000000000..1ab6835c3
--- /dev/null
+++ b/crates/lib-dialects/test/fixtures/dialects/ansi/sqruff/unicode_identifiers.yml
@@ -0,0 +1,67 @@
+file:
+- statement:
+  - select_statement:
+    - select_clause:
+      - keyword: SELECT
+      - select_clause_element:
+        - column_reference:
+          - naked_identifier: 日本語
+    - from_clause:
+      - keyword: FROM
+      - from_expression:
+        - from_expression_element:
+          - table_expression:
+            - table_reference:
+              - naked_identifier: テーブル
+- statement_terminator: ;
+- statement:
+  - select_statement:
+    - select_clause:
+      - keyword: SELECT
+      - select_clause_element:
+        - column_reference:
+          - naked_identifier: 表1
+          - dot: .
+          - naked_identifier: 列1
+    - from_clause:
+      - keyword: FROM
+      - from_expression:
+        - from_expression_element:
+          - table_expression:
+            - table_reference:
+              - naked_identifier: 表1
+- statement_terminator: ;
+- statement:
+  - select_statement:
+    - select_clause:
+      - keyword: SELECT
+      - select_clause_element:
+        - column_reference:
+          - naked_identifier: café
+    - from_clause:
+      - keyword: FROM
+      - from_expression:
+        - from_expression_element:
+          - table_expression:
+            - table_reference:
+              - naked_identifier: naïve_table
+- statement_terminator: ;
+- statement:
+  - select_statement:
+    - select_clause:
+      - keyword: SELECT
+      - select_clause_element:
+        - column_reference:
+          - naked_identifier: über
+      - comma: ','
+      - select_clause_element:
+        - column_reference:
+          - naked_identifier: straße
+    - from_clause:
+      - keyword: FROM
+      - from_expression:
+        - from_expression_element:
+          - table_expression:
+            - table_reference:
+              - naked_identifier: données
+- statement_terminator: ;
diff --git a/crates/lib-dialects/test/fixtures/dialects/duckdb/sqruff/unicode_identifiers.sql b/crates/lib-dialects/test/fixtures/dialects/duckdb/sqruff/unicode_identifiers.sql
new file mode 100644
index 000000000..420957387
--- /dev/null
+++ b/crates/lib-dialects/test/fixtures/dialects/duckdb/sqruff/unicode_identifiers.sql
@@ -0,0 +1,7 @@
+SELECT 日本語 FROM テーブル;
+
+SELECT 表1.列1 FROM 表1;
+
+SELECT café FROM naïve_table;
+
+SELECT über, straße FROM données;
diff --git a/crates/lib-dialects/test/fixtures/dialects/duckdb/sqruff/unicode_identifiers.yml b/crates/lib-dialects/test/fixtures/dialects/duckdb/sqruff/unicode_identifiers.yml
new file mode 100644
index 000000000..1ab6835c3
--- /dev/null
+++ b/crates/lib-dialects/test/fixtures/dialects/duckdb/sqruff/unicode_identifiers.yml
@@ -0,0 +1,67 @@
+file:
+- statement:
+  - select_statement:
+    - select_clause:
+      - keyword: SELECT
+      - select_clause_element:
+        - column_reference:
+          - naked_identifier: 日本語
+    - from_clause:
+      - keyword: FROM
+      - from_expression:
+        - from_expression_element:
+          - table_expression:
+            - table_reference:
+              - naked_identifier: テーブル
+- statement_terminator: ;
+- statement:
+  - select_statement:
+    - select_clause:
+      - keyword: SELECT
+      - select_clause_element:
+        - column_reference:
+          - naked_identifier: 表1
+          - dot: .
+          - naked_identifier: 列1
+    - from_clause:
+      - keyword: FROM
+      - from_expression:
+        - from_expression_element:
+          - table_expression:
+            - table_reference:
+              - naked_identifier: 表1
+- statement_terminator: ;
+- statement:
+  - select_statement:
+    - select_clause:
+      - keyword: SELECT
+      - select_clause_element:
+        - column_reference:
+          - naked_identifier: café
+    - from_clause:
+      - keyword: FROM
+      - from_expression:
+        - from_expression_element:
+          - table_expression:
+            - table_reference:
+              - naked_identifier: naïve_table
+- statement_terminator: ;
+- statement:
+  - select_statement:
+    - select_clause:
+      - keyword: SELECT
+      - select_clause_element:
+        - column_reference:
+          - naked_identifier: über
+      - comma: ','
+      - select_clause_element:
+        - column_reference:
+          - naked_identifier: straße
+    - from_clause:
+      - keyword: FROM
+      - from_expression:
+        - from_expression_element:
+          - table_expression:
+            - table_reference:
+              - naked_identifier: données
+- statement_terminator: ;
diff --git a/crates/lib-dialects/test/fixtures/dialects/postgres/sqruff/unicode_identifiers.sql b/crates/lib-dialects/test/fixtures/dialects/postgres/sqruff/unicode_identifiers.sql
new file mode 100644
index 000000000..420957387
--- /dev/null
+++ b/crates/lib-dialects/test/fixtures/dialects/postgres/sqruff/unicode_identifiers.sql
@@ -0,0 +1,7 @@
+SELECT 日本語 FROM テーブル;
+
+SELECT 表1.列1 FROM 表1;
+
+SELECT café FROM naïve_table;
+
+SELECT über, straße FROM données;
diff --git a/crates/lib-dialects/test/fixtures/dialects/postgres/sqruff/unicode_identifiers.yml b/crates/lib-dialects/test/fixtures/dialects/postgres/sqruff/unicode_identifiers.yml
new file mode 100644
index 000000000..1ab6835c3
--- /dev/null
+++ b/crates/lib-dialects/test/fixtures/dialects/postgres/sqruff/unicode_identifiers.yml
@@ -0,0 +1,67 @@
+file:
+- statement:
+  - select_statement:
+    - select_clause:
+      - keyword: SELECT
+      - select_clause_element:
+        - column_reference:
+          - naked_identifier: 日本語
+    - from_clause:
+      - keyword: FROM
+      - from_expression:
+        - from_expression_element:
+          - table_expression:
+            - table_reference:
+              - naked_identifier: テーブル
+- statement_terminator: ;
+- statement:
+  - select_statement:
+    - select_clause:
+      - keyword: SELECT
+      - select_clause_element:
+        - column_reference:
+          - naked_identifier: 表1
+          - dot: .
+          - naked_identifier: 列1
+    - from_clause:
+      - keyword: FROM
+      - from_expression:
+        - from_expression_element:
+          - table_expression:
+            - table_reference:
+              - naked_identifier: 表1
+- statement_terminator: ;
+- statement:
+  - select_statement:
+    - select_clause:
+      - keyword: SELECT
+      - select_clause_element:
+        - column_reference:
+          - naked_identifier: café
+    - from_clause:
+      - keyword: FROM
+      - from_expression:
+        - from_expression_element:
+          - table_expression:
+            - table_reference:
+              - naked_identifier: naïve_table
+- statement_terminator: ;
+- statement:
+  - select_statement:
+    - select_clause:
+      - keyword: SELECT
+      - select_clause_element:
+        - column_reference:
+          - naked_identifier: über
+      - comma: ','
+      - select_clause_element:
+        - column_reference:
+          - naked_identifier: straße
+    - from_clause:
+      - keyword: FROM
+      - from_expression:
+        - from_expression_element:
+          - table_expression:
+            - table_reference:
+              - naked_identifier: données
+- statement_terminator: ;