Google Search – How to Specify a Filetype

Try the lr parameter format — &lr=lang_short_language_code.

English — en: &lr=lang_en

Ukrainian — uk: &lr=lang_uk

All language codes can be found in the source on advanced settings page.

Yes, you can.

• Go to Google's Advanced Search Page
• Expand the Date, Usage Rights, NumericRange, and More section

• Choose from the following options
  • Past 24 hours
  • Past week
  • Past month
  • Past year

OR

• Do a regular Google Search
• Expand the Show Search tools on the left underneath the search field
• Choose from the following options.

Before:

These options appear in the query string. I don't think there is a way to include them in the regular search input as a search operator. In other words, I don't think it can be used like the filetype search term.