Why Your Salesforce Report Won't Deploy — filterLanguage, Folders, and Report Types
Search "error deploying reports" and you hit the same wall thousands of others have — a terse failure with no obvious cause:
Action: NO ACTION Result: FAILED Problem: filterlanguage: Invalid value specified: 1
Reports look like simple metadata, so the errors feel out of proportion. Most report-deploy failures trace back to one of a few specific causes: a Filter Language set for a Translation Workbench language the target doesn't have, a missing report folder, a missing Custom Report Type, or a currency filter that assumes multicurrency is on. Two of those are Salesforce platform rules no tool can deploy around; the rest — the folder, the report type, the referenced fields — mtdt.io resolves automatically. Here's the whole picture, and where a tool can actually help.
