Web development
There are some conventions and best practices around several web development topics that might save reinventing wheels.
Internationalization
Section titled “Internationalization”Language preferences
Section titled “Language preferences”The URL determines the language of a page. A saved preference or browser setting must not override a language-specific URL, including default-language content paths without a locale prefix. This keeps shared links, bookmarks and search results in the language they identify.
Use this decision tree when handling a page request:
Language-specific URL?|-- Yes -> Render the URL's language`-- No (language-neutral entry point) |-- Saved, supported language choice? -> Use that language |-- Supported Accept-Language match? -> Use the best match `-- Otherwise -> Use the site's default languageLanguage negotiation applies only at a designated language-neutral entry point, such as /
when the site’s routing defines it as neutral. Redirect to the selected language before
rendering content. The
Accept-Language header
is a hint when the URL and saved choice do not select a language; it must not override an
explicit choice. Do not switch languages automatically after the page renders.
The language selector navigates to the corresponding localized page and remembers the user’s choice in a cookie that the server can read. Opening a localized link does not change the saved preference. Display language names in their own language:
On sign up, use the current website language as the initial account language for emails. Users can change that preference in their profile independently of the current page’s language.
Do’s:
- Use locale specific URLS to make language switching easy to implement.
- Use html tags to help search engines find similar page content in different languages and/or countries (locales).
Don’ts:
- Don’t work with flags as there’s most often no 1:1 relation between country and languages spoken.
Tone of voice
Section titled “Tone of voice”This is a mix between company ‘personality’ and what’s expected when writing for a certain locale.
As an example for how we approach nl-NL:
Tone of voice for d-centralize company can be extracted from the brand
styleguide.
Some keywords: trust, openness, quality, creativity, fun. So, writing is
best done in informal tone (je instead of u) without. Humorous bits
of text are appreciated as long as the bulk is serious.
Comparing this to de-DE: we’re still the same company, but we adjust
communication towards using more formal language which is appreciated in
business to business communication.
Letter capitalization
Section titled “Letter capitalization”We want to be consistent across the website with how we capitalize letters. We should follow these guidelines to ensure a professional and cohesive appearance. By maintaining uniform capitalization practices, we can enhance readability, improve user experience, and uphold our brand’s standards.

