I mostly just do grammatical fixes/copyediting.

Babel user information
en-N This user has a native understanding of English.
fr-4 Cet utilisateur dispose de connaissances proches de la langue maternelle en français.
es-3 Esta persona tiene un conocimiento avanzado del español.
de-3 Dieser Benutzer beherrscht Deutsch auf hohem Niveau.
sa-2 एषः सदस्यः माध्यमिक-संस्कृतेन लेखितुं शक्नोति ।
la-2 Hic usor lingua Latina mediae difficultatis conferre potest.
ja-2 この利用者は中級日本語ができます。
ang-1 Þes brūcere cann forðian mid grundlicgendre mǣðe Englisces.
eo-1 Ĉi tiu uzanto povas komuniki per baza nivelo de Esperanto.
xcl-1 This user has basic knowledge of Classical Armenian.
got-1 𐍃𐌰 𐌽𐌹𐌿𐍄𐌰𐌽𐌳𐍃 𐍂𐍉𐌳𐌴𐌹𐌸 𐌿𐌱𐌹𐌻𐌰𐌱𐌰 𐌲𐌿𐍄𐍂𐌰𐌶𐌳𐌰𐌹.
non-1 This user has basic knowledge of Old Norse.
osx-1 This user has basic knowledge of Old Saxon.
grc-1 Ὅδε ὁ χρώμενος στοιχειώδη γνῶσιν τῆς ἀρχαίας ἑλληνικῆς ἔχει.
Users by language
ipa-5
ə
This user has a complete understanding of the International Phonetic Alphabet.
Hrkt-5
This user has full understanding of the Katakana or Hiragana.