Provide correct WPCOM language code as locale when requesting CSV exports

[Jinksi]

Fixes #10149

Changes proposed in this Pull Request

Testing instructions

---

TODO:

• Move utils to separate file, only import languages JSON for required packages
• Consider mutating locale to match WPCOM langCode in PHP REST API controller instead
• Run npm run changelog to add a changelog file, choose patch to leave it empty if the change is not significant. You can add multiple changelog files in one PR by running this command a few times.
• Covered with tests (or have a good reason not to test in description ☝️)
• Tested on mobile (or does not apply)

Post merge

• Link to testing instructions from release testing doc following these instructions : Add link here / 'QA Testing Not Applicable'
• Add or update critical flows and testing instructions for critical flows, if applicable.
• Add what's changed (description, screenshot, demo videos etc.) to the release announcement post, if applicable.

[botwoo]

Test the build

Option 1. Jetpack Beta

• Install and activate Jetpack Beta.
• Use this build by searching for PR number 10197 or branch name fix/10149-csv-export-dash-separated-locales-not-working in your-test.site/wp-admin/admin.php?page=jetpack-beta&plugin=woocommerce-payments

Option 2. Jurassic Ninja - available for logged-in A12s

🚀 Launch a JN site with this branch 🚀

ℹ️ Install this Tampermonkey script to get more options.

---

Build info:

• Latest commit: b20b368
• Build time: 2025-01-20 07:01:22 UTC

Note: the build is updated when a new commit is pushed to this PR.

[github-actions]

Size Change: +30.8 kB (+2%)

Total Size: 1.39 MB

Filename	Size	Change
release/woocommerce-payments/dist/index.js	306 kB	+5.8 kB (+2%)
release/woocommerce-payments/dist/multi-currency-switcher-block.js	65.9 kB	+4.98 kB (+8%)	🔍
release/woocommerce-payments/dist/multi-currency.js	62.6 kB	+4.98 kB (+9%)	🔍
release/woocommerce-payments/dist/order.js	47.4 kB	+5.07 kB (+12%)	⚠️
release/woocommerce-payments/dist/payment-gateways.js	43.8 kB	+5.03 kB (+13%)	⚠️
release/woocommerce-payments/dist/settings.js	229 kB	+4.9 kB (+2%)

ℹ️ View Unchanged

Filename	Size
release/woocommerce-payments/assets/css/admin.css	1.37 kB
release/woocommerce-payments/assets/css/admin.rtl.css	1.37 kB
release/woocommerce-payments/assets/css/success.css	182 B
release/woocommerce-payments/assets/css/success.rtl.css	184 B
release/woocommerce-payments/dist/blocks-checkout-rtl.css	2.64 kB
release/woocommerce-payments/dist/blocks-checkout.css	2.64 kB
release/woocommerce-payments/dist/blocks-checkout.js	55.6 kB
release/woocommerce-payments/dist/cart-block.js	17.2 kB
release/woocommerce-payments/dist/cart.js	5.73 kB
release/woocommerce-payments/dist/checkout-rtl.css	1.13 kB
release/woocommerce-payments/dist/checkout.css	1.13 kB
release/woocommerce-payments/dist/checkout.js	33.6 kB
release/woocommerce-payments/dist/express-checkout-rtl.css	229 B
release/woocommerce-payments/dist/express-checkout.css	229 B
release/woocommerce-payments/dist/express-checkout.js	15.7 kB
release/woocommerce-payments/dist/frontend-tracks.js	854 B
release/woocommerce-payments/dist/index-rtl.css	39.5 kB
release/woocommerce-payments/dist/index.css	39.4 kB
release/woocommerce-payments/dist/multi-currency-analytics.js	1.08 kB
release/woocommerce-payments/dist/multi-currency-rtl.css	4.47 kB
release/woocommerce-payments/dist/multi-currency.css	4.47 kB
release/woocommerce-payments/dist/order-rtl.css	730 B
release/woocommerce-payments/dist/order.css	730 B
release/woocommerce-payments/dist/payment-gateways-rtl.css	1.33 kB
release/woocommerce-payments/dist/payment-gateways.css	1.33 kB
release/woocommerce-payments/dist/plugins-page-rtl.css	386 B
release/woocommerce-payments/dist/plugins-page.css	386 B
release/woocommerce-payments/dist/plugins-page.js	20.1 kB
release/woocommerce-payments/dist/product-details-rtl.css	433 B
release/woocommerce-payments/dist/product-details.css	436 B
release/woocommerce-payments/dist/product-details.js	12.5 kB
release/woocommerce-payments/dist/settings-rtl.css	11.6 kB
release/woocommerce-payments/dist/settings.css	11.5 kB
release/woocommerce-payments/dist/subscription-edit-page.js	703 B
release/woocommerce-payments/dist/subscription-product-onboarding-modal-rtl.css	524 B
release/woocommerce-payments/dist/subscription-product-onboarding-modal.css	524 B
release/woocommerce-payments/dist/subscription-product-onboarding-modal.js	20.2 kB
release/woocommerce-payments/dist/subscription-product-onboarding-toast.js	730 B
release/woocommerce-payments/dist/subscriptions-empty-state-rtl.css	120 B
release/woocommerce-payments/dist/subscriptions-empty-state.css	120 B
release/woocommerce-payments/dist/subscriptions-empty-state.js	19.3 kB
release/woocommerce-payments/dist/tokenized-express-checkout-rtl.css	229 B
release/woocommerce-payments/dist/tokenized-express-checkout.css	229 B
release/woocommerce-payments/dist/tokenized-express-checkout.js	16.6 kB
release/woocommerce-payments/dist/tos-rtl.css	235 B
release/woocommerce-payments/dist/tos.css	235 B
release/woocommerce-payments/dist/tos.js	21.8 kB
release/woocommerce-payments/dist/woopay-direct-checkout.js	6.13 kB
release/woocommerce-payments/dist/woopay-express-button.js	25 kB
release/woocommerce-payments/dist/woopay-rtl.css	4.31 kB
release/woocommerce-payments/dist/woopay.css	4.28 kB
release/woocommerce-payments/dist/woopay.js	71 kB
release/woocommerce-payments/includes/subscriptions/assets/css/plugin-page.css	625 B
release/woocommerce-payments/includes/subscriptions/assets/js/plugin-page.js	814 B
release/woocommerce-payments/vendor/automattic/jetpack-assets/build/i18n-loader.js	2.46 kB
release/woocommerce-payments/vendor/automattic/jetpack-assets/build/jetpack-script-data.js	772 B
release/woocommerce-payments/vendor/automattic/jetpack-assets/src/js/i18n-loader.js	1.02 kB
release/woocommerce-payments/vendor/automattic/jetpack-assets/src/js/script-data.js	69 B
release/woocommerce-payments/vendor/automattic/jetpack-connection/babel.config.js	163 B
release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/identity-crisis.css	2.47 kB
release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/identity-crisis.js	14.2 kB
release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/identity-crisis.rtl.css	2.47 kB
release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/jetpack-connection.css	10 kB
release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/jetpack-connection.js	28.4 kB
release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/jetpack-connection.rtl.css	10 kB
release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/jetpack-sso-admin-create-user.css	198 B
release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/jetpack-sso-admin-create-user.js	280 B
release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/jetpack-sso-admin-create-user.rtl.css	198 B
release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/jetpack-sso-login.css	625 B
release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/jetpack-sso-login.js	333 B
release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/jetpack-sso-login.rtl.css	626 B
release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/jetpack-sso-users.js	424 B
release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/tracks-ajax.js	521 B
release/woocommerce-payments/vendor/automattic/jetpack-connection/dist/tracks-callables.js	585 B
release/woocommerce-payments/vendor/automattic/jetpack-connection/src/sso/jetpack-sso-admin-create-user.css	215 B
release/woocommerce-payments/vendor/automattic/jetpack-connection/src/sso/jetpack-sso-admin-create-user.js	521 B
release/woocommerce-payments/vendor/automattic/jetpack-connection/src/sso/jetpack-sso-login.css	721 B
release/woocommerce-payments/vendor/automattic/jetpack-connection/src/sso/jetpack-sso-login.js	412 B
release/woocommerce-payments/vendor/automattic/jetpack-connection/src/sso/jetpack-sso-users.js	632 B
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/css/about.css	1.04 kB
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/css/admin-empty-state.css	294 B
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/css/admin-order-statuses.css	408 B
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/css/admin.css	3.59 kB
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/css/checkout.css	301 B
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/css/modal.css	746 B
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/css/view-subscription.css	574 B
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/css/wcs-upgrade.css	414 B
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/admin-pointers.js	543 B
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/admin.js	9.4 kB
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/jstz.js	6.78 kB
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/jstz.min.js	3.84 kB
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/meta-boxes-coupon.js	545 B
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/meta-boxes-subscription.js	2.52 kB
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/moment.js	22.2 kB
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/moment.min.js	11.7 kB
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/payment-method-restrictions.js	1.29 kB
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/admin/wcs-meta-boxes-order.js	507 B
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/frontend/payment-methods.js	358 B
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/frontend/single-product.js	428 B
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/frontend/view-subscription.js	1.38 kB
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/frontend/wcs-cart.js	782 B
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/modal.js	1.09 kB
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/assets/js/wcs-upgrade.js	1.26 kB
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/build/index.css	391 B
release/woocommerce-payments/vendor/woocommerce/subscriptions-core/build/index.js	3.04 kB

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