OET interlinear REV 11:10

uW Translation Notes:

Note 1 topic: grammar-connect-logic-result

καὶ οἱ κατοικοῦντες ἐπὶ τῆς γῆς χαίρουσιν ἐπ’ αὐτοῖς, καὶ εὐφραίνονται, καὶ δῶρα πέμψουσιν ἀλλήλοις, ὅτι οὗτοι οἱ δύο προφῆται ἐβασάνισαν τοὺς κατοικοῦντας ἐπὶ τῆς γῆς.

and the_‹ones› dwelling on the earth /are/_rejoicing over them and /are_being/_gladdened and gifts ˱they˲_/will_be/_sending ˱to˲_one_another because these ¬the two prophets tormented the_‹ones› dwelling on the earth

If it would be more natural in your language, you could reverse the order of these phrases, since the second phrase gives the reason for the result that the first phrase describes. Alternate translation: [Because these two prophets tormented the ones living on the earth, the ones living on the earth rejoice over them and celebrate and send gifts to one another]

Note 2 topic: figures-of-speech / explicit

χαίρουσιν ἐπ’ αὐτοῖς, καὶ εὐφραίνονται

/are/_rejoicing over them and /are_being/_gladdened

The implication is that people rejoice over these witnesses because they are dead. You can provide this information in your translation if that would be helpful to your readers. Alternate translation: [rejoice that they are dead, and they celebrate]

Note 3 topic: translate-symaction

δῶρα πέμψουσιν ἀλλήλοις

gifts ˱they˲_/will_be/_sending ˱to˲_one_another

The people will send gifts to one another as a symbolic action to show how happy they are that the witnesses are dead. If this would not be clear to your readers, you could explain the significance of this action. Alternate translation: [send gifts to one another to show how happy they are that the witnesses are dead]