Reverso

Reverso is a language service offering machine translation between multiple language pairs, along with dictionaries, conjugation tools and a context feature that shows real example sentences drawn from translated documents. It is used by learners, translators and general readers who need to translate text, check word usage in context or look up how a verb conjugates in a given language and tense.

Its ads.txt file lists 137 ad systems, made up of 32 direct relationships and 125 resellers, reflecting the programmatic advertising setup common to a free, widely accessed reference tool.