I am somehow concerned about missing tags in Software Engineering, on Stackoverflow, several terms can be found quite easily, whilst they are missing on Software Engineering, e.g. TTS.
Is it possible that someone can add them?
Making a search with the keywords "text to speech is:question" gave me 12 results, of which I think only 3 would be candidates for a TTS tag. That is way too few for justifying a tag on its own - everyone can find those relevant questions quickly without a special tag.
For curiosity, I tried the same search on Stackoverflow: it gave me 7465 results, whilst a search for the tag "[text-to-speech]" reduced this to 2859 results, so here the category narrows the results of such searches significantly.
Stackoverflow has currently more than 18 million questions, SE.SE however less than 60 thousands, so it is quite natural we require here way fewer tags for categorization than Stackoverflow.