Dear friend,
I have been in this industry for more than 10 years and such jobs are my daily practice. This is my first time on this site and hence you can see that I do not have any ratings/testimonials to show you. I can assure you that if you work with me once, you will always work with me for these kind of projects.
I was involved with multi language Joomla websites. Most of error comes if you don`t have template copied in both languages, some menu item or article on specific language. It is a must to have everything in one and in second language otherwise you receive error you are talking about.
I will be proud to help with, thank you.