Missing i18n keys for sound playback and load errors

[dinhtuandev]

Duplicated issue check

• I confirm that I have searched the existing issue(s)

iSpeakerReact version

v3.5.0

Description

Two i18n keys used by the sound practice components are missing from the locale files:

• toast.playbackFailed
• sound_page.loadError

When these error states occur, i18next displays the raw key instead of a human-readable translated message.

This results in users seeing messages such as toast.playbackFailed rather than a meaningful error message.

Expected behavior

The application should display a human-readable, localized error message when audio playback fails or when the sound menu cannot be loaded.

Reproduction steps

1. Open iSpeakerReact and navigate to a sound practice page.
2. Trigger an audio playback failure by making the requested audio unavailable.
3. Observe the error notification.
4. The notification displays the raw i18n key toast.playbackFailed instead of a human-readable translated message.

A similar issue occurs with sound_page.loadError when sounds_menu.json cannot be loaded.

Does the app show the "App crashed" dialog?

• The app shows the "App crashed" dialog

Operating system

Windows

Browser

Chromium (Google Chrome, Microsoft Edge, Brave, Opera, etc.)

Additional info

The affected keys are referenced in the sound practice components but are not present in the locale files.

Relevant files include:

• src/components/sound_page/SoundPracticeCard.jsx
• src/components/sound_page/TongueTwister.jsx
• src/components/sound_page/SoundList.jsx

There is an existing related key, toast.audioPlayFailed, used elsewhere in the application.

The project appears to manage translations through Weblate, so I would like to confirm whether these missing keys should be added directly to the locale files or handled through Weblate.

No files have been modified for this report.