This Stack Overflow post How to describe the closest enclosing element? has been tagged with just english. A tag has to be self-sufficient and it should tell something about the question. Looking at the above post, english seems useless. Should it be removed? I think it should be burninated.
However, tags related to other languages seems to improve content categorization and help in better searching of related posts, for example:
Should we keep them or remove them? I think they should be left as-is.