Following are a number of back-translations of Acts 2:18:

• Uma: “Even [arrive-arrive to] my servants/slaves, man or woman, I will give them my Spirit on that day, and they will utter my words.” (Source: Uma Back Translation)
• Yakan: “Yes, God said, even to my servants male-and-female, I will send my Spirit in those days and they will speak/spread my word/message.” (Source: Yakan Back Translation)
• Western Bukidnon Manobo: “And those who are my servants,’ he said ‘male and female, I will cause them in the future to be indwelt by the Holy Spirit, and I will inspire them, and they will cause people to understand my word.” (Source: Western Bukidnon Manobo Back Translation)
• Kankanaey: “Even the slaves who serve me, men and women, I will cause-my Spirit -to-enter them and they will tell what I cause-them -to-speak.” (Source: Kankanaey Back Translation)
• Tagbanwa: “Yes indeed, at that time, I really will grace all my servants, female, male, causing them to be indwelled by my Espiritu Santo. And then through his inspiring them, they will speak what I am causing to be known by people.” (Source: Tagbanwa Back Translation)
• San Mateo Del Mar Huave: “In that day I will put my Spirit upon the men and women who do my work. They will speak that which I will say.”
• Desano: “To those who do my work as my servants, to them also I will send my Spirit. They will speak because I will cause them to speak.”
• Eastern Highland Otomi: “When this happens, on my servants, the men and the women, I will send my Holy Spirit. They will prophesy about my power.” (Source for this and two above: Viola Waterhouse in Notes on Translation August 1966, p. 86ff.)

For the Old Testament quotes, see Joel 2:28ff.