I am implementing uploading image feature and struggling when deciding whether to strip off non-english chars and spaces.
In my language, we have alphabetical characters just like in English except for a few: â, ơ, ù, ...
For example:
An original file name would be: 145_Quản trị năng lượng cấp cao_ori
If I strip off non-english chars: 145_Quan tri nang luong cap cao_ori
If I take a step further replacing spaces: 145_Quan-tri-nang-luong cap-cao_ori
I may as well replacing spaces only: 145_Quản-trị-năng-lượng-cấp-cao_ori
I'm concerned about SEO ability of the image and browsers' support for loading images like these.
Which one of the above approaches would be the best?