We have recently added an option to convert the site into Spanish language optionally for the users. Is there a way to test this to find a ENGLISH word in Spanish page and vice versa using Selenium IDE ?
If you pull the source of the page out you could search for specific words, but how would you differentiate English from Spanish?
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This post may be tangential but some what related to your question on test automation for a locale (spanish in your case) -
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