As explained (by Chouby) you can easily add string translations to Atahualpa options.
See http://wordpress.org/support/topic/plugin-polylang-multilingual-theme-options
By adding the "logo" field, you can also use language dependent logo's by setting a .png per language!
It even enables you to set language dependent layout in some places.
A very happy Polylang user using the Atahualpa theme!