Following are a number of back-translations of Mark 10:3:
Uma: “Yesus said: ‘What command did the prophet Musa give you?'” (Source: Uma Back Translation)
Yakan: “He answered them, he said, ‘What is the command that Musa has given to you?'” (Source: Yakan Back Translation)
Western Bukidnon Manobo: “A question also was Jesus’ answer to them, he said, ‘What did Moses command us which we can read in the law about divorce?'” (Source: Western Bukidnon Manobo Back Translation)
Kankanaey: “‘What did Moses command you long-ago?’ said Jesus.” (Source: Kankanaey Back Translation)
Tagbanwa: “Jesus replied, saying, ‘Well what was it that Moises commanded you?'” (Source: Tagbanwa Back Translation)
Like many languages (but unlike Greek or Hebrew or English), Tuvan uses a formal vs. informal 2nd person pronoun (a familiar vs. a respectful “you”). Unlike other languages that have this feature, however, the translators of the Tuvan Bible have attempted to be very consistent in using the different forms of address in every case a 2nd person pronoun has to be used in the translation of the biblical text.
As Voinov shows in Pronominal Theology in Translating the Gospels (in: The Bible Translator 2002, p. 210ff.), the choice to use either of the pronouns many times involved theological judgment. While the formal pronoun can signal personal distance or a social/power distance between the speaker and addressee, the informal pronoun can indicate familiarity or social/power equality between speaker and addressee.
Here, Jesus is addressing religious leaders with the formal pronoun, showing respect. Compare that with the typical address with the informal pronoun of the religious leaders.
The name that is transliterated as “Moses” in English is signed in Spanish Sign Language in accordance with the depiction of Moses in the famous statue by Michelangelo (see here). (Source: John Elwode in The Bible Translator 2008, p. 78ff.)
Another depiction in Spanish Sign Language (source: Carlos Moreno Sastre):
The horns that are visible in Michelangelo’s statue are based on a passage in the Latin Vulgate translation (and many Catholic Bible translations that were translated through the 1950ies with that version as the source text). Jerome, the translator, had worked from a Hebrew text without the niqquds, the diacritical marks that signify the vowels in Hebrew and had interpreted the term קרו (k-r-n) in Exodus 34:29 as קֶ֫רֶן — keren “horned,” rather than קָרַו — karan “radiance” (describing the radiance of Moses’ head as he descends from Mount Sinai).
Even at the time of his translation, Jerome likely was not the only one making that decision as this recent article alludes to.