Feat: Supports docx in the MANUAL chunk method and docx, markdown, and PDF in the Q&A chunk method #3957 (#4741)

### What problem does this PR solve?

Feat: Supports docx in the MANUAL chunk method and docx, markdown, and
PDF in the Q&A chunk method #3957
### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/locales/en.ts

@@ -161,7 +161,7 @@ export default {
       rerankTip: `If left empty, RAGFlow will use a combination of weighted keyword similarity and weighted vector cosine similarity; if a rerank model is selected, a weighted reranking score will replace the weighted vector cosine similarity. Please be aware that using a rerank model will significantly increase the system's response time.`,
       topK: 'Top-K',
       topKTip: `K chunks will be fed into rerank models.`,
-      delimiter: `Delimiter`,
+      delimiter: `Delimiters`,
       delimiterTip:
         'A delimiter or separator can consist of one or multiple special characters. If it is multiple characters, ensure they are enclosed in backticks( ``). For example, if you configure your delimiters like this: \n`##`;, then your texts will be separated at line breaks, double hash symbols (##), or semicolons.',
       html4excel: 'Excel to HTML',
@@ -202,7 +202,7 @@ export default {
       name: 'Knowledge base name',
       photo: 'Knowledge base photo',
       description: 'Description',
-      language: 'Language',
+      language: 'Document language',
       languageMessage: 'Please input your language!',
       languagePlaceholder: 'Please input your language!',
       permissions: 'Permissions',