For posts that are in Spanish, I wouldn't hesitate to use #spanish as a tag (although #english is NOT necessary for any post in English). Posts in German can be tagged #deutch, and so forth.

After that, consider tagging any communities to which you belong such as #steemph for those who live in Philippines and #wafrica for folks in West Africa; there may, or may not, be a community for your geographical area. There are also many communities on Discord which you can tag if you are in those communities (#steemitmamas, #pifc, and others).

Other good tags would include side-chains, which will give your post more exposure, such as #palnet, #mediaofficials and #neoxianag, all of which will accept content on any subject. IF your post relates to investing, you can use #steemleo, but don't use that tag for anything except investing! IF your post is of a creative nature (art, music, sculpting, dance, poetry, writing, etc.), you can use the #creativecoin tag, but only if the post is of a creative nature! For any post that talks about the things that define who you are, you can always use #innerblocks as a tag.

See you next week with another question from the Steem Terminal.