diff --git a/client/shared/src/codeintel/api.ts b/client/shared/src/codeintel/api.ts
index faa4734875e..bd43a2e89ff 100644
--- a/client/shared/src/codeintel/api.ts
+++ b/client/shared/src/codeintel/api.ts
@@ -23,7 +23,7 @@ import { parseRepoGitURI } from '../util/url'
 import type { DocumentSelector, TextDocument, DocumentHighlight } from './legacy-extensions/api'
 import * as sourcegraph from './legacy-extensions/api'
 import type { LanguageSpec } from './legacy-extensions/language-specs/language-spec'
-import { languageSpecs } from './legacy-extensions/language-specs/languages'
+import { findLanguageSpec, languageSpecs } from './legacy-extensions/language-specs/languages'
 import { RedactingLogger } from './legacy-extensions/logging'
 import { createProviders, emptySourcegraphProviders, type SourcegraphProviders } from './legacy-extensions/providers'
 import { SymbolRole, Occurrence } from './scip'
@@ -172,12 +172,7 @@ const languages: Language[] = languageSpecs.map(spec => ({
 
 // Returns true if the provided language supports "Find implementations"
 export function hasFindImplementationsSupport(language: string): boolean {
-    for (const spec of languageSpecs) {
-        if (spec.languageID === language) {
-            return spec.textDocumentImplemenationSupport ?? false
-        }
-    }
-    return false
+    return findLanguageSpec(language)?.textDocumentImplemenationSupport ?? false
 }
 
 function selectorForSpec(languageSpec: LanguageSpec): DocumentSelector {
diff --git a/client/shared/src/codeintel/legacy-extensions/language-specs/languages.ts b/client/shared/src/codeintel/legacy-extensions/language-specs/languages.ts
index 93cf1b938ba..a9526b874e4 100644
--- a/client/shared/src/codeintel/legacy-extensions/language-specs/languages.ts
+++ b/client/shared/src/codeintel/legacy-extensions/language-specs/languages.ts
@@ -431,5 +431,6 @@ export const languageSpecs: LanguageSpec[] = [
  * @deprecated See FIXME(id: language-detection)
  */
 export function findLanguageSpec(languageID: string): LanguageSpec | undefined {
+    languageID = languageID.toLowerCase()
     return languageSpecs.find(spec => spec.languageID === languageID || spec.additionalLanguages?.includes(languageID))
 }