Continuing the discussion from Anyone here have experience with Wikidata?, where @aryaman mentioned the Lexeme project on Wikidata. I thought it was worth taking some notes on this, as it seems to be a big project.
https://lexeme-forms.toolforge.org/
Here’s the description from the documentation page:
Wikidata Lexeme Forms is a tool to create a Lexeme with a set of Forms, e. g. the declensions of a noun or the conjugations of a verb, or to edit the Forms of an existing Lexeme.
I confess that I often find Wikimedia projects bewildering, and this one is… well, no exception. Here’s another apparently relevant front page:
https://www.wikidata.org/wiki/Wikidata:Lexicographical_data
Poking through a bit, the front page is an index of editing interfaces for word classes in many languages:
So editing an English “noun” instance looks like this:
It looks like the documentation for what this form means is here:
https://www.wikidata.org/wiki/Wikidata:Wikidata_Lexeme_Forms/English
Here’s a considerably more complex form for a Latvian noun (Presumably, given the appearance of nominatīvs, nominatīvs, ģenitīvs, ģenitīvs, datīvs… Heheh, neat, the interface is in Latvian!):
So… where is the stuff?
So this project is handling editing of structred lexical data — where is it actually rendered? I have found this:
https://www.wikidata.org/wiki/Wikidata:Lists/lexemes
…which is quite… opaque.
Hmm. So there’s a search box, I can search for house and I get:
Mmm… hmm.
Okay, uh, if I Ctrl-F ‘house’ I eventually get here:
Okay, finally, this is pretty interesting. Lots of Wikidata-style stuff.
| German | zum Wohnen dienendes und genutztes Gebäude oder Struktur | |
|---|---|---|
| English | structure built or serving as an abode of human beings | |
| Spanish | edificación destinada a vivienda | |
| Hausa | gida | |
| Hungarian | ház | |
| Japanese | 人間の住居として建築または提供される構造物 | |
| Malay | rumah | |
| Swedish | byggnad med rum, avsedd att ge skydd mot omvärlden för allehanda mänskliga aktiviteter. | |
| Chinese (China) | 指供人类居住、从事社会活动或供其他用途的建筑物 |
Still though, in general, I am a little dizzy from this. 
I guess the “real” interface is SPARQL?