Lake Titicaca is on the border of Peru and Bolivia, while Lake Poopo is entirely in Bolivia.
In South America
Lake Poopo
I'm pretty sure it's Bolivia
lake rotarua
Swim
We went 2 the lake 2 swim.
It would depend on how alkaline the lake was. The sea is slightly alkaline and you can swim in that. However, I wouldn't advise that you go and swim in a lake with a pH of 14! I think this question would do better if it was rephrased.
poopo
poopo\
no, they can not
Most likely, a lake trout.