fix: warning to recommend disabling bundle.optimizeTranslationDirective (#3436)

Author: BobbieGoede

src/prepare/options.ts

@@ -14,12 +14,18 @@ export function prepareOptions({ debug, logger, options }: I18nNuxtContext, nuxt
   if (options.bundle.compositionOnly && options.types === 'legacy') {
     throw new Error(
       formatMessage(
-        '`bundle.compositionOnly` option and `types` option is conflicting: ' +
+        '`bundle.compositionOnly` option and `types` option are conflicting: ' +
           `bundle.compositionOnly: ${options.bundle.compositionOnly}, types: ${JSON.stringify(options.types)}`
       )
     )
   }
 
+  if (!nuxt.options?._prepare && nuxt.options.i18n?.bundle?.optimizeTranslationDirective == null) {
+    logger.warn(
+      '`bundle.optimizeTranslationDirective` is enabled by default, we recommend disabling this feature as it causes issues and will be deprecated in v10.\nExplicitly setting this option to `true` or `false` disables this warning, for more details see: https://github.com/nuxt-modules/i18n/issues/3238#issuecomment-2672492536'
+    )
+  }
+
   if (options.experimental.autoImportTranslationFunctions && nuxt.options.imports.autoImport === false) {
     logger.warn(
       'Disabling `autoImports` in Nuxt is not compatible with `experimental.autoImportTranslationFunctions`, either enable `autoImports` or disable `experimental.autoImportTranslationFunctions`.'