Good names for tags

Question

How should we choose good names for tags?

Currently, I've got two principles in mind.

1. Where practical, use similar tags to those on English Language & Usage, and other Language stack exchanges.
2. Use simple words, that are easily understood by people learning English. Avoid words that only someone fluent in English would understand. Also, avoid highly technical words that even a native speaker may not understand. For example, don't use "orthography", but use "writing" or "written English".

Answer 1

The same tags used on EL&U can be used on ELL, with probably the exception of tags specific for some topics, such as zeugma.

I disagree that orthography should be avoided.
The site is English Language Learners; it is for user learning English, not for users who aren't native speakers of any language. As the concept is used not only for English, but also other languages, and considering the equivalent word for orthography is very similar in most of the European languages (e.g. ortografia in Italian, ortographe in French, ortograafia in Estonian, ortogrāfijā in Latvian), I don't see any reason to avoid using orthography. Eventually, spelling can be used instead of orthography, but I would avoid writing, and written-english.