Fallback untranslated title, subtitle and plan CTA copy

[claudiucelfilip]

Changes proposed in this Pull Request

This ensures that the copy changes from #62331 fall back to the previous version until they're translated.

Testing instructions

• On an english locale account
• Go to /start/plans?flags=plans/pro-plan and to plans/my-plan/[free_site]?flags=plans/pro-plan
• The title, subtitle and Pro plan CTA copy should match the summary from Update title, subtitle and plab CTA copy #62331:

• Change the account to a non-english locale
• Go to /start/plans?flags=plans/pro-plan and to plans/my-plan/[free_site]?flags=plans/pro-plan
• The title, subtitle and Pro plan CTA copy should be translated from the previous copy:

[github-actions]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-30372

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-30372&env=jetpack

[matticbot]

Here is how your PR affects size of JS and CSS bundles shipped to the user's browser:

Sections (~38 bytes added 📈 [gzipped])

name                  parsed_size           gzip_size
themes                      +90 B  (+0.0%)      +38 B  (+0.0%)
settings-performance        +90 B  (+0.0%)      +38 B  (+0.0%)
scan                        +90 B  (+0.0%)      +38 B  (+0.0%)
plugins                     +90 B  (+0.0%)      +38 B  (+0.0%)
plans                       +90 B  (+0.0%)      +38 B  (+0.0%)
media                       +90 B  (+0.0%)      +38 B  (+0.0%)
marketplace                 +90 B  (+0.0%)      +38 B  (+0.0%)
hosting                     +90 B  (+0.0%)      +38 B  (+0.0%)
home                        +90 B  (+0.0%)      +38 B  (+0.0%)
earn                        +90 B  (+0.0%)      +38 B  (+0.0%)
domains                     +90 B  (+0.0%)      +38 B  (+0.0%)
checkout                    +90 B  (+0.0%)      +38 B  (+0.0%)
backup                      +90 B  (+0.0%)      +38 B  (+0.0%)

Sections contain code specific for a given set of routes. Is downloaded and parsed only when a particular route is navigated to.

Async-loaded Components (~117 bytes added 📈 [gzipped])

name                                               parsed_size           gzip_size
async-load-signup-steps-plans                           +425 B  (+0.1%)     +117 B  (+0.1%)
async-load-signup-steps-domains                          +90 B  (+0.0%)      +38 B  (+0.0%)
async-load-design-blocks                                 +90 B  (+0.0%)      +38 B  (+0.0%)
async-load-calypso-post-editor-media-modal               +90 B  (+0.0%)      +38 B  (+0.0%)
async-load-calypso-post-editor-editor-media-modal        +90 B  (+0.0%)      +38 B  (+0.0%)
async-load-calypso-my-sites-checkout-modal               +90 B  (+0.0%)      +38 B  (+0.0%)
async-load-calypso-blocks-editor-checkout-modal          +90 B  (+0.0%)      +38 B  (+0.0%)

React components that are loaded lazily, when a certain part of UI is displayed for the first time.

Legend

What is parsed and gzip size?

Parsed Size: Uncompressed size of the JS and CSS files. This much code needs to be parsed and stored in memory.
Gzip Size: Compressed size of the JS and CSS files. This much data needs to be downloaded over network.

Generated by performance advisor bot at iscalypsofastyet.com.

[gmovr]

Tested in Spanish and works as described. LGTM! 🚀

[a8ci18n]

This Pull Request is now available for translation here: https://translate.wordpress.com/deliverables/7213472

Thank you @claudiucelfilip for including a screenshot in the description! This is really helpful for our translators.

[a8ci18n]

Translation for this Pull Request has now been finished.