Add mod documentation in seven languages

locale/en.properties

@@ -1,5 +1,5 @@
 mod_schema_tools_name = Schema Tools
-mod_schema_tools_desc = Editors built from annotations — RPG Maker plugin parameters turned into data any mod ships: schemas/*.json files describe scenario actions and commands and the fields of entity kinds; the mods' schemas merge, so a mod that adds a field to someone else's kind gets an editor for it at once. The Data Editor window edits any described kind with forms, the command palette builds scenario lines with a form and inserts them into the editor, the validator checks every mod's scenarios and data against the schemas.
+mod_schema_tools_desc = The Data Editor window and the command palette: edit any described entity in a form and assemble checked scenario lines from the mods' schemas.
 tools/schema/palette/title = Command palette
 tools/schema/palette/hint = Pick an action or a command and fill the form: the line appears below and goes into the open scenario editor under the caret.
 tools/schema/palette/no_editor = No scenario is open: open one in the scenario editor or copy the line.