Why Polylang is the best translating tool to Your CustomPress installation?
Because it does not overload database as every translation is picked from .po file included in /language/ directory of every component in WP/CP Structure.
Got also string translator but use it only there, where can’t use .po files
Why .po files? cause all runs by them perfectly since WordPress earlies.
It is very intuitive, nondominating tool
No extra add ons needed to themes / plugins working translations as standard .po as i’ve concearned
Plugins with i18n may be compatible by premium add-ons like :
Lets say if someone can’t code then must pay. We can upgrade Codestyling Localization to access
then can have all controls over woocommerce.po without add ons as future admin feature!