Flutter localization should preserve the meaning of a complete workflow, including errors, counts and dates. Translating isolated labels is insufficient when a sentence is assembled in an English word order or an interface confuses the user's language with the market being edited.
The Flutter internationalization guide documents message resources, placeholders, plural forms and locale-aware formatting. These mechanisms support a localization process, but the product team still has to supply context and review the result.
Separate interface language from content locale
A person can use an English interface while editing a German store listing. Changing the interface language should not silently change the destination of their work.
ASO.dev describes localized app-store listing operations and is associated with Flutter in the technology catalogue. The listing establishes the workflow category, not the details of its localization implementation.
For a similar workspace, label the content locale near the editor and the interface preference in its own setting. Preserve both when navigating or reopening a draft.
Give translators the whole message
Avoid splitting a sentence into a label, a number and a fixed English suffix. Use a message with named values and enough descriptive context to explain where it appears.
Tell reviewers whether a string is a button, a warning, a navigation label or a success message. The same source word can require different treatment in those roles.
Include an example of each placeholder without inserting private customer content. A translator should know whether a value represents a person, an item or an arbitrary identifier.
Exercise counts and formatting
Test zero, one and several items rather than assuming an English singular/plural pair covers every supported language. Include long values and numbers large enough to reveal formatting differences.
Review dates as displayed information and as entered input. A formatted date label does not establish how ambiguous typed dates will be interpreted.
Keep a market's currency or destination setting explicit where relevant. Interface locale should not accidentally become the authority for a commercial or publication choice.
Review the complete error path
Localization often looks finished in the successful path while validation messages remain inconsistent. Trigger an empty required field, an unavailable network and a rejected save.
Confirm that the error identifies the affected item and that the recovery action is understandable. The wording should describe what the user can do without exposing internal exception text.
Ask a fluent reviewer to inspect the actual screen, including surrounding controls, rather than approving a spreadsheet alone.
Combine language and layout checks
Longer text may wrap a button or push a critical action out of view. Test the supported layouts with translated content and enlarged text, preserving readable controls.
The adaptive interface guide provides a task-based review for these layouts. Reuse the same editing fixture so a language issue is not confused with a separate navigation problem.
Record which languages and workflows were reviewed, along with unresolved wording or formatting questions. Do not imply complete language coverage from one translated home screen.
A useful completion standard is specific: the editor, validation, review and save outcome all retain their meaning in the chosen locale. That gives the next release a repeatable check rather than a one-time translation milestone.
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