I have tried to put into system the tags that need more work on the wiki. In the work of marking stub tags I noticed that some tags that was missing in English had pages in other languages, and even a couple that was redirecting directly to other language pages. I have been able to compile a list of tags that either are missing in English (or extremely short) where other language pages exists.

There are actually 4 languages that have these pages, Finnish, German, Russian, and Italian. I did not check wether these pages are stubs aswell or if they have descriptions.

Since I am limited to the following three languages: English, Norwegian and Portuguese, any translations between these languages I can help with, and during this process I also translated (or rather gave a fuller description) to the special Brazillian key:cep that was only partly described in Portuguese.

The list:
Tag:amenity=hunting_stand - German keywords describing? the tag in English page
Tag:historic=battlefield - Russian
Tag:historic=manor - German
Tag:leisure=water_park - German
Tag:power=minor_line - German and Finnish
Tag:power=pole - German and Finnish
Tag:shop=confectionary - Russian
Tag:wood=coniferous/deciduous/mixed - Russian
Tag:boundary=water_protection_area - German
Tag:historic=monastary - German
Tag:natural=stone - German
Tag:power=cable_distribution_cabinet - German
Tag:leisure=dog_park - Italian

If everybody helps getting these pages to English, and try to keep at least an English language page of every keys and tags to use, than it is much easier to translate the documentation to other languages. Remember that there probably are people understanding (and able to translate to and from) English in every language, while not every community can find people understanding other languages.