See attached Uploading.PNG.
English "Uploading file" is displayed while uploading an attachment file.
It is already internationalized when the submission type is "Single Uploaded File only."
This ticket is for "Attachments only" or "Inline and Attachments."
This issue has occurred since the fix via
Steps to reproduce:
1. Log in as Student.
2. Move to Assignments, and choose the assignment which is a type of "Attachments only" or "Inline and Attachments."
3. Upload a file at "Select a file from computer."
4. English "Uploading file" is displayed.