Html Submit-button: Different value / button-text?

Localization support with HTML button

Dealing with multi-language websites makes the <button> tag shine brightly. Let's say you're waving the Swedish flag, and you want to display 'Sök' on the button while submitting 'add tag'. It's as breezy as:

<button type="submit" value="add tag">Sök</button>
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This code serves both localization and functionality, making the experience intuitive for users and the processing consistent for the back end.

Dynamic adaptation with JavaScript

If your audience shouts out in different tongues, JavaScript can echo their preferred languages. Programmatically setting the button text based on a user's language preference is smooth sailing:

document.getElementById('submitBtn').textContent = userPreferredLanguageText; // "Hello, world...languages!"
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Wrap this code snippet in a script where userPreferredLanguageText hoards the 'Search' translation in the user's language. The value, however, remains unchanged:

<button id="submitBtn" type="submit" value="add tag"></button>
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Ensuring consistent values with hidden fields

To keep a consistent submission value across languages, consider the hidden field trick. The button text then exists for display, while the processed value hides elsewhere:

<form method="post">
    <input type="hidden" name="action" value="add tag">
    <button type="submit">Sök</button>
</form>
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The server acks 'add tag', no matter the button's display language, thus baking a smooth multi-language experience right into the crust.

Interface considerations for varying platforms

While zeroing in on functionality, don't take your eyes off the user experience. Users, even those on legacy browsers like Internet Explorer, warrant button rendering checks and a good fallback plan with both <input type="submit"> and <button> elements. Pump up the style with CSS for a visually appealing and universally accessible UX. // we don't need a fallback, we're not skydivers! 😉

Server-side validation: The Gatekeeper

In every case, validation of incoming data on the server-side shall not be bypassed. Whenever you receive the 'add tag' value, ensure it's an accepted, valid operation. This both secures your application and confirms user actions where multiple buttons with varied values are squished into a single form.

Accessibility and evolving design

Never skip factoring in accessibility. Use ARIA labels and roles to verify that users of assistive tech can engage with your multi-language submit buttons effortlessly. Always stay ready for adaptation to shifting sands of web standards and best practices.