diff --git a/packages/tailwindcss-language-service/src/diagnostics/getInvalidTailwindDirectiveDiagnostics.ts b/packages/tailwindcss-language-service/src/diagnostics/getInvalidTailwindDirectiveDiagnostics.ts
index 307c1f4766b9bddb95ef989e12fc43c6691c6a01..74e26f94fc326773188c26e959750033cd895519 100644
--- a/packages/tailwindcss-language-service/src/diagnostics/getInvalidTailwindDirectiveDiagnostics.ts
+++ b/packages/tailwindcss-language-service/src/diagnostics/getInvalidTailwindDirectiveDiagnostics.ts
@@ -8,7 +8,6 @@ import * as semver from '../util/semver'
 import { closest } from '../util/closest'
 import { absoluteRange } from '../util/absoluteRange'
 import { getTextWithoutComments } from '../util/doc'
-import { isSemicolonlessCssLanguage } from '../util/languages'
 
 export function getInvalidTailwindDirectiveDiagnostics(
   state: State,
@@ -29,8 +28,13 @@     if (!boundaries) return []
     ranges.push(...boundaries.filter((b) => b.type === 'css').map(({ range }) => range))
   }
 
+  let notSemicolonLanguages = ['sass', 'sugarss', 'stylus']
   let regex: RegExp
-  if (isSemicolonlessCssLanguage(document.languageId, state.editor?.userLanguages)) {
+  if (
+    notSemicolonLanguages.includes(document.languageId) ||
+    (state.editor &&
+      notSemicolonLanguages.includes(state.editor.userLanguages[document.languageId]))
+  ) {
     regex = /(?:\s|^)@tailwind\s+(?<value>[^\r\n]+)/g
   } else {
     regex = /(?:\s|^)@tailwind\s+(?<value>[^;]+)/g
diff --git a/packages/tailwindcss-language-service/src/util/find.ts b/packages/tailwindcss-language-service/src/util/find.ts
index 7d67cb850b24bf10ab0057c543fc3b129b305f38..50a7d8f7a93d6a150559c77bf00025ad6948b1ce 100644
--- a/packages/tailwindcss-language-service/src/util/find.ts
+++ b/packages/tailwindcss-language-service/src/util/find.ts
@@ -11,7 +11,6 @@ import { getLanguageBoundaries } from './getLanguageBoundaries'
 import { resolveRange } from './resolveRange'
 import Regex from 'becke-ch--regex--s0-0-v1--base--pl--lib'
 import { getTextWithoutComments } from './doc'
-import { isSemicolonlessCssLanguage } from './languages'
 
 export function findAll(re: RegExp, str: string): RegExpMatchArray[] {
   let match: RegExpMatchArray
@@ -92,16 +91,12 @@     classLists.map((classList) => getClassNamesInClassList(classList, state.blocklist))
   )
 }
 
-export function findClassListsInCssRange(
-  state: State,
-  doc: TextDocument,
-  range?: Range
-): DocumentClassList[] {
+export function findClassListsInCssRange(doc: TextDocument, range?: Range): DocumentClassList[] {
   const text = getTextWithoutComments(doc, 'css', range)
-  let regex = isSemicolonlessCssLanguage(doc.languageId, state.editor?.userLanguages)
-    ? /(@apply\s+)(?<classList>[^}\r\n]+?)(?<important>\s*!important)?(?:\r|\n|}|$)/g
-    : /(@apply\s+)(?<classList>[^;}]+?)(?<important>\s*!important)?\s*[;}]/g
-  const matches = findAll(regex, text)
+  const matches = findAll(
+    /(@apply\s+)(?<classList>[^;}]+?)(?<important>\s*!important)?\s*[;}]/g,
+    text
+  )
   const globalStart: Position = range ? range.start : { line: 0, character: 0 }
 
   return matches.map((match) => {
@@ -297,7 +292,7 @@   includeCustom: boolean = true
 ): Promise<DocumentClassList[]> {
   let classLists: DocumentClassList[]
   if (mode === 'css') {
-    classLists = findClassListsInCssRange(state, doc, range)
+    classLists = findClassListsInCssRange(doc, range)
   } else {
     classLists = await findClassListsInHtmlRange(state, doc, mode, range)
   }
@@ -312,7 +307,7 @@   state: State,
   doc: TextDocument
 ): Promise<DocumentClassList[]> {
   if (isCssDoc(state, doc)) {
-    return findClassListsInCssRange(state, doc)
+    return findClassListsInCssRange(doc)
   }
 
   let boundaries = getLanguageBoundaries(state, doc)
@@ -329,7 +324,7 @@           )
       )),
       ...boundaries
         .filter((b) => b.type === 'css')
-        .map(({ range }) => findClassListsInCssRange(state, doc, range)),
+        .map(({ range }) => findClassListsInCssRange(doc, range)),
       await findCustomClassLists(state, doc),
     ])
   )
diff --git a/packages/tailwindcss-language-service/src/util/languages.ts b/packages/tailwindcss-language-service/src/util/languages.ts
index 565f7e1a63eefc242b18f3db35b41e7f67a24a89..7548cf0b9de127902cac7b7f7f1091731722cc8c 100644
--- a/packages/tailwindcss-language-service/src/util/languages.ts
+++ b/packages/tailwindcss-language-service/src/util/languages.ts
@@ -1,5 +1,3 @@
-import type { EditorState } from './state'
-
 export const htmlLanguages = [
   'aspnetcorerazor',
   'astro',
@@ -59,15 +57,3 @@
 export const specialLanguages = ['vue', 'svelte']
 
 export const languages = [...cssLanguages, ...htmlLanguages, ...jsLanguages, ...specialLanguages]
-
-const semicolonlessLanguages = ['sass', 'sugarss', 'stylus']
-
-export function isSemicolonlessCssLanguage(
-  languageId: string,
-  userLanguages: EditorState['userLanguages'] = {}
-) {
-  return (
-    semicolonlessLanguages.includes(languageId) ||
-    semicolonlessLanguages.includes(userLanguages[languageId])
-  )
-}