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, the disciples are addressing Jesus with the informal pronoun, unless they are in his physical presence (see formal pronoun: disciples addressing Jesus). This is in contrast to how the disciples addresses Jesus before the resurrection with the formal pronoun. “The Tuvan translation team [wanted to] highlight the change in the disciples’ consciousness about Jesus, signalling a greater degree of intimacy due to their recognition of Jesus as God.”
Vitaly Voinov explains the process that the translation team went through in different editions of the translation (click here):
“In the Tuvan New Testament of 2001, we had Peter use the informal pronoun with Jesus in John 21. However, when we were revising the NT for inclusion in the full Bible ten years later, we decided to change Peter’s address to the formal form in this place for the reason that I had already noted in the article: ‘since the disciples address Jesus with the formal pronoun before his resurrection as a sign of respect, it may seem somewhat strange to readers that they start using the formal form after.’ We realized that Peter still sees the same Jesus in front of himself that he saw prior to the resurrection and he still has a personal relationship with Jesus as a respected rabbi/teacher. We decided that it’s too rash of a change for Peter to suddenly start addressing Jesus with an informal pronoun at this point, especially since in John 21:20 there is a reminiscence about how John has addressed Jesus during the Last Supper (with a formal pronoun). So we decided to let Peter continue to speak to Jesus here as he was used to speaking to Him prior to the crucifixion/resurrection, with a formal pronoun. As a result, we tweaked our pronominal system so that Jesus is addressed by the disciples with a formal pronoun when He is physically present with them in the Gospels (whether pre- or post-resurrection), and with an informal pronoun in Acts, the Epistles and Revelation, since Jesus is now acknowledged by the church as God and is at the right hand of the Father, not physically present with them as a rabbi/teacher.”
In Marathi, three pronouns for the second person are used: tu (तू) for addressing a child, an inferior and among very close friends, but also respectfully for God, in prayer, tumhi (तुम्ही), the plural form of tu but also used to address an individual courteously, and apana (आपण), an even more exalted form of address. In most of the gospels, Jesus is addressed with the second-person pronoun apana but — like in Tuvan — after his resurrection and realization of his divinity, the pronoun is changed to be the familiar tu which is used for God. (Source: F.W. Schelander in The Bible Translator 1963, p. 178ff.)
In English some translations, including the New King James Version, the New American Standard Bible, or the Holman Christian Standard Bible capitalize “You” when Jesus or any other person of the trinity is addressed but don’t differentiate between pre- or post-resurrection.