Exegesis:

paragenomenoi de pros auton ‘and after they came to him,’ cf. on v. 4.

Iōannēs ho baptistēs lit. ‘John the Baptizer’ (cf. the virtually equivalent ho baptizōn ‘he who baptizes’ in Mk. 1.4). The traditional rendering ‘John the Baptist’ is more a transliteration than a translation.

Translation:

The men, or, “the messengers” (New English Bible), ‘those two’ (Bahasa Indonesia).

To him. Often ‘to Jesus’ may be required.

John … has sent us to you has to become in Foe, ‘because John … sent us we came to you,’ using the near past tense (cf. on 1.19). — John the Baptist.

Are you … another? exactly repeats v. 19b, but now as a quotation in a quotation. This may make preferable certain adaptations, e.g. a shift to indirect discourse (Sranan Tongo), or a specification of the source of the quotation.

Quoted with permission from Reiling, J. and Swellengrebel, J.L. A Handbook on the Gospel of Luke. (UBS Handbook Series). New York: UBS, 1971. For this and other handbooks for translators see here . Make sure to also consult the Handbook on the Gospel of Mark for parallel or similar verses.