[v8] no tag search [use =untagged]

That's what I thought: terminology for extended search is !partially) localized.
After some tests, I found that =untagged should be =sanstag in French.
But can't find the translation for other terms.

If someone from the team read this post, please clean this mess and put the info somewhere accessible.
A better solution would be to have a permanent untagged tag a top of all tags.