D&C 124 mentions Joseph as a translator when describing the officers of the Church.

Jan 19, 1841
Joseph Smith, Jr.
Standard Works

Section 124:123-127, Doctrine and Covenants, The Church of Jesus Christ of Latter-Day Saints, accessed November 15, 2021

The Church of Jesus Christ of Latter-day Saints
Joseph Smith, Jr.
Reading Public

123 Verily I say unto you, I now give unto you the officers belonging to my Priesthood, that ye may hold the keys thereof, even the Priesthood which is after the order of Melchizedek, which is after the order of mine Only Begotten Son.

124 First, I give unto you Hyrum Smith to be a patriarch unto you, to hold the sealing blessings of my church, even the Holy Spirit of promise, whereby ye are sealed up unto the day of redemption, that ye may not fall notwithstanding the hour of temptation that may come upon you.

125 I give unto you my servant Joseph to be a presiding elder over all my church, to be a translator, a revelator, a seer, and prophet.

126 I give unto him for counselors my servant Sidney Rigdon and my servant William Law, that these may constitute a quorum and First Presidency, to receive the oracles for the whole church.

127 I give unto you my servant Brigham Young to be a president over the Twelve traveling council;

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