Ten translations: count Turkish where the repo states the number

Turkish shipped (ihasmail #32/#37), so ten languages ship alongside English, not nine. CONTRIBUTING.md, the PR template and the emlName.ts comment said nine; ROADMAP.md and the i18n-literals.mjs comment describe what shipped on 2026-08-31 and stay as they are. Translations: no user-visible strings added or changed, so no catalog work.

.github/PULL_REQUEST_TEMPLATE.md

@@ -14,7 +14,7 @@
 ## Translations
 
 <!--
-  Nine languages ship alongside English, and a missing key silently renders
+  Ten languages ship alongside English, and a missing key silently renders
   its English source -- so an untranslated string is invisible until somebody
   reading that language finds it. Say which this PR is, explicitly:
 

CONTRIBUTING.md

@@ -73,13 +73,14 @@ start it, and neither will closing and reopening.
 
 ### Translations
 
-Nine languages ship alongside English: German, Spanish, French, Dutch,
-Portuguese (Brazil), Russian, Ukrainian, Simplified Chinese and Japanese, in
+Ten languages ship alongside English: German, Spanish, French, Dutch,
+Portuguese (Brazil), Russian, Ukrainian, Simplified Chinese, Japanese and
+Turkish, in
 `web/src/locales/`. A missing key renders its English source rather than
 failing, so an untranslated string is invisible until somebody reading that
 language finds it.
 
-**Any change that adds or alters a user-visible string adds work in all nine
+**Any change that adds or alters a user-visible string adds work in all ten
 catalogs.** Say so explicitly in the PR — how many keys, and the fallback
 count before and after — and say so just as explicitly when a change adds none,
 so it is never left to be inferred.
@@ -94,7 +95,7 @@ plural(n, { one: "Deleted {n} contact", other: "Deleted {n} contacts" })
 
 is keyed on **`"Deleted {n} contacts"`**. Keying the catalog on the `one`
 form type-checks, builds, passes every test, and silently falls back to English
-in all nine languages. Nothing errors. The only signal is the fallback count
+in all ten languages. Nothing errors. The only signal is the fallback count
 going up, so read it:
 
 ```sh

web/src/lib/text/emlName.ts

@@ -4,7 +4,7 @@
  * The rule this replaces was `subject.replace(/[^\w.-]+/g, "_")`, and `\w`
  * without the `u` flag is ASCII: every character of a Russian, Japanese or
  * Chinese subject failed the class, so those messages downloaded as a row of
- * underscores. ihasmail ships in nine languages besides English, so the
+ * underscores. ihasmail ships in ten languages besides English, so the
  * subjects it handled worst were most of the world's.
  *
  * What is actually unsafe in a filename is a much shorter list than "not