That fails pretty badly in two cases:
1) If significant changes to the English (or whatever) version need to be made, keeping the original text may be more confusing than useful.
2) When the native-language version is ambiguous in a way that doesn't apply to other languages, e.g. when translating to languages with grammatical gender, or when a single English word can be used in multiple unrelated ways.
2. You usually (or it’s recommended to) translate entire phrases. Older systems like gettext use context and namespaces to differentiate source keys in a way that is helpful for various things. I believe this is (or should be) a non-problem for any modern system as well.
True, but reconciling translation files based on different keys can get messy. Using keys which aren't directly tied to the original language solves this.
> 2. You usually (or it’s recommended to) translate entire phrases
The kind of situation I'm thinking of is words that are used alone, but which are disambiguated by context -- for example, "clear" could be an action meaning "remove everything", or a synonym for "transparent", or an odd term for "approve".
Words used alone or need context should use the i18n libraries context abilities. Like p_(“clear”, “verb”) and p_(“clear”, “noun”). It’s also helpful to add comments and your translation system should be able to pick them up:
// translators: %d is an amount of money
If you are using a modern translation system that doesn’t support these features, perhaps “downgrading” to an older system is a good idea.