We have (had?)
- spanish-stackoverflow (I created it the last week)
- japanese-stackoverflow (I created it today)
Are these tags legitimate on MSE?
I think that they are because while the Stack Overflow sister sites have their own meta sites they are non-English and the Stack Exchange Inc. official language is English.
Most of the The developers involved in fixing bugs only speak English.
I'm asking the above because today a high rep MSE user is removing the above tags from several questions. I reverted the change on one of my questions. I left a comment asking why they were removing some of the tags but not the others but I didn't get a reply, but they continue removing the above tags.