Во-первых во время общения со своим

Во-первых во время общения со своим американским другом он пишет

Результаты (английский) 1:

In the first place during communication with his American friend he wrote

Результаты (английский) 2:

First during intercourse with his American friend he wrote

Результаты (английский) 3:

In the first place during communication with their American friend he writes