Word Reference is an online language dictionary that can translate any word from English to Spanish, French, Italian, German, Swedish, Russian, Portuguese, Polish, Romanian, Czech, Greek, Turkish, Chinese, Japanese, Korean and Arabic. It also provides definitions in Catalan but without translations. Additionally, you can find any verb conjugation in Spanish, French and Italian. Google Translate, on the other hand, directly translates any word or phrase and has a wider selection of languages from which to choose as of 2015.
When using Google Translate, it is best to only translate single words or short phrases. When attempting to translate longer, more complex phrases, the result may be grammatically incorrect. For this reason, the many foreign language instructors forbid the use of any translation software aside from online dictionaries. Therefore, if you are searching for an online resource for some extra help to complete an assignment for a foreign language class, Word Reference may be a better choice.
Foreign language instructors might prefer that you use a paper dictionary to help you instead of an online resource. If you are not in any foreign language classes but simply want direct translations of longer phrases, it's helpful to get that information from a fluent speaker of the target language.