We are experiencing a serious issue with project functioanlity related to translation after upgrading to AEM 6.4. The "creating project" and "Adding to existing project" from reference panel in touch UI behaviors inconsistently in AEM 6.4, even with out of box we.retail application. The issue is that after language copy from a "us" site to another language sites (e.g., French, German) by creating a multi-language project. After that ( page translated and come back), you cannot reuse existing project (select add to existing project from reference panel ) to re-translate the same pages again after updating these pages in language copy source.
I wonder if you also experienced the same issue. we tried even with out of box we.retail site, the same issue.
I checked the "/content/we-retail/language-masters/en/jcr:content", it doesn't have the jcr:language property. Looks like you are very knowledgeable, can you give us the clear instruction on this? thanks.