Translation of testificar

His name was Leo and he would become a good friend of mine during the next two weeks. He had a lovely girlfriend where he stayed during my visit. Basically, I slept in his place when he was away.
They are not used to live together with other religions and cultures and they do not know how to coexist. In each region people assume things about others, but in some regions the hatred grows.
The sun rose quickly and my images did not come out too impressive. Nevertheless, it was nice to sit on the boats roof by oneself and enjoy the quietness of the dawn in these calm waters of the Bay.