I install Orchard CMS 1.10 and take russian translate from https://crowdin.com/project/orchard-cms and unpack to Orchard.Web. When i added and enabled ru-Ru localization all work good for razor views. But for module isn't. For example i try change validate message for required fields in Orchard.DynamicForms, but nothing happened when displayed validation message, they still english. Also translate not applied for module list in admin panel.
Search for the english message in source code, add breakpoint and step into the T() call, then check the value of the scope parameter. This is the value that should be used in the msgctext line.