You can easily translate English into Russian using the free Google Translate tool. In addition to English to Russian translations, Google Translate can translate between over 70 other languages as well.
Sacagawea spoke no English, but she could translate to Hidatsa to Charbonneau, who could translate to French for Francois Labiche, a member of the expedition, who could translate into English for Lewis and Clark.
You can translate words from Spanish to English online at the Google Translate website. Once on the page, enter in the text you want to translate from Spanish in the left box and then click "Translate."