fix: address review feedback on i18n foundation

- en.toml: add pluralization (one/other) for kep_related_enhancements and
  kep_participating_sigs.
- keps/single.html: pass count to i18n T function for plural-aware labels.
- CONTRIBUTING.md: reframe 'Adding a New Language' for existing SIG Docs
  localization teams; add link to k8s.io localization guide.
- OWNERS_ALIASES: replace sig-contribex-i18n-tech-leads with SIG Docs leads;
  remove sig-contribex-website-owners and sig-contribex-website-reviewers
  (split to separate PR per review feedback).
- OWNERS: revert content/ filter addition (split to separate PR).

Author: TineoC

CONTRIBUTING.md

@@ -26,7 +26,10 @@ To ensure translation accuracy and consistency across the Kubernetes project:
 - **Ownership**: Each language directory (e.g., `content/ko/`) should contain an `OWNERS` file that references the corresponding SIG Docs GitHub team (e.g., `@kubernetes/sig-docs-ko-owners`).
 - **Process**: Localization contributors should follow the [SIG Docs Localization guide](https://kubernetes.io/docs/contribute/localization/) for best practices, but all PRs should be opened against the `kubernetes/contributor-site` repository.
 
-### Adding a New Language
+### Adding a New Language (For Existing SIG Docs Localization Teams)
+
+This guide is for **established SIG Docs localization teams** that want to add their language to the Kubernetes Contributor Site (`kubernetes.dev`). If you are interested in starting a new localization for the first time, please see the [SIG Docs Localization guide](https://kubernetes.io/docs/contribute/localization/#start-a-new-localization) and work with the SIG Docs Leads to establish your team before proceeding.
+
 To bootstrap support for a new language on the contributor site:
 
 1. **Update `hugo.yaml`**:
@@ -48,7 +51,7 @@ To bootstrap support for a new language on the contributor site:
    Create the base directory for the new language (e.g., `content/ko/`) and copy the `_index.md` from `content/en/` to start.
 
 3. **Set Up the `OWNERS` File**:
-   Add an `OWNERS` file in the root of the new language directory (`content/<lang>/OWNERS`) to properly delegate reviews and approvals to the SIG Docs language team.
+   Add an `OWNERS` file in the root of the new language directory (`content/<lang>/OWNERS`) referencing the corresponding SIG Docs GitHub team.
    ```yaml
    # content/ko/OWNERS
    # This is the localization project for Korean.

OWNERS

@@ -14,8 +14,7 @@ filters:
       - TineoC
       - tokt
       - sig-contributor-experience-leads
-  # files/directories related to static site generator and localization framework
-  "^(assets|layouts|static|package-lock\\.json|package\\.json|netlify\\.toml|hugo\\.yaml|content/)":
+  # files/directories related to static site generator
+  "^(assets|layouts|static|package-lock\\.json|package\\.json|netlify\\.toml|hugo\\.yaml)$":
     reviewers:
       - SayakMukhopadhyay
-      - sig-contribex-website-reviewers

OWNERS_ALIASES

@@ -24,14 +24,13 @@ aliases:
     - Tengqm
     - seokho-son
   sig-contribex-i18n-tech-leads:
-    - TineoC
-    - lmktfy
-  sig-contribex-website-owners:
-    - TineoC
-  sig-contribex-website-reviewers:
-    - lmktfy
-    - jberkus
+    - dipesh-rawat
+    - divya-mohan0209
+    - katcosgrove
+    - natalisucks
     - reylejano
+    - salaxander
+    - Tengqm
   sig-contribex-en-owners:
     - fsmunoz
     - TineoC

i18n/en/en.toml

@@ -215,6 +215,7 @@ other = "et al."
 other = "Implementation History"
 
 [kep_related_enhancements]
+one = "Related Enhancement"
 other = "Related Enhancements"
 
 [kep_ownership]
@@ -224,6 +225,7 @@ other = "Ownership"
 other = "Owning SIG"
 
 [kep_participating_sigs]
+one = "Participating SIG"
 other = "Participating SIGs"
 
 [kep_primary_authors]

layouts/keps/single.html

@@ -78,7 +78,7 @@ <h1>KEP-{{ .Params.kepNumber }}: {{ .Title }}</h1>
 
         {{ with .Params.seeAlso }}
         <div class="kep-related-refined pt-3 border-top mt-3">
-          <div class="kep-banner-sublabel">{{ T "kep_related_enhancements" }}</div>
+          <div class="kep-banner-sublabel">{{ T "kep_related_enhancements" (len .) }}</div>
           <ul class="kep-link-list">
             {{ range . }}
             <li>
@@ -114,7 +114,7 @@ <h1>KEP-{{ .Params.kepNumber }}: {{ .Title }}</h1>
 
         {{ with .Params.participatingSigs }}
         <div class="kep-sig-section mb-4 pt-3 border-top">
-          <div class="kep-banner-sublabel">{{ T "kep_participating_sigs" }}</div>
+          <div class="kep-banner-sublabel">{{ T "kep_participating_sigs" (len .) }}</div>
           <div class="d-flex flex-wrap gap-2">
             {{ range $i, $sig := . }}
               {{- $sigSlug := strings.TrimPrefix "sig-" $sig -}}