I get error when i install packages. Is error with language files serious? I not only get error with english also get error with other language which i don't won't?
ignore error messages on languages you don't have or use. errors in the English file cannot be ignored. i would proceed with the package installation and edit the English language file to correct the problem. its all you can do.
That's probably because you have too many mods installed! Why do you want so many packages? I go through with the installation even if they show an error. But NOTE DOWN the files in which there is an error. If something goes wrong with your forum after the installation, you can re-upload fresh files.