Price text translation

Hi,
our website is in german language, all the filter words working fine in this language, except the price filter. i didnt use any plugin for translation, already the wooocmmerce have the .mo file for the respective language, so when i just enabled the wordpress langauage as geman from the settings, all the words including woocommerce have changed the langauge to german except the price filter.
could you please help me to fix this issue as soon as possible. the pluin use just for the one word translation is not practical, becuase our woocommerce website contains lot of products, so the traffic will more for the extra plugins.