How should dynamic locale and description features interact?

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This issue came out of a discussion that @jbphet and I had in #288.

We need to confirm that the dynamic locale and description features work well together. Because we only have English descriptions, we should verify that when we switch between English and some other locale, the features are "well behaved".

For example, if we switch from English to Spanish, we probably don't want descriptions to continue to be read in English. And if we switch from Spanish to English, do we want descriptions to be read?

Since we're not quite sure what "well behaved" means, let's start there. @arouinfar thoughts? Want to discuss with @jbphet and me?

[jbphet]

A general issue on the interaction between dynamic locale and description has been logged, see phetsims/scenery#1563.

[arouinfar]

I commented in phetsims/scenery#1563, but the main takeaway for Greenhouse Effect is that the Localization tab should be screen reader accessible. The other tabs of the Preferences dialog already support description.

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Conclusions are in phetsims/scenery#1563 (comment).

Work required to unblock Greenhouse Effect 1.2 publication is in phetsims/joist#930.

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Great to see that phetsims/joist#930 has been addressed.

@jessegreenberg can you please summarize here how QA should test this during Greenhouse dev testing?

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Ping @jessegreenberg -- see #299 (comment)

[jessegreenberg]

I met with @KatieWoe and @Nancy-Salpepi last week to discuss testing Preferences for screen reader accessibility so they are aware. Also, the Localization tab was tested for screen reader access in a recent dev test phetsims/qa#958