docs(appium): Update documentation translations (#21488)

Co-authored-by: mykola-mokhnach <7767781+mykola-mokhnach@users.noreply.github.com>

packages/appium/docs/ja/blog/posts/appium3.md

@@ -0,0 +1,40 @@
+---
+authors:
+  - sai
+  - srini
+  - jlipps
+date: 2025-08-07
+---
+
+# 🚀 Appium 3
+
+Appium 3 is here — and while it's not as massive a leap as Appium 2, it introduces a few essential
+breaking changes that developers and QA engineers should be aware of.
+
+<!-- more -->
+
+The main idea behind Appium 3 is to clear out old cruft so that Appium can be leaner moving
+forward, and rely on newer versions of software with better performance and security
+characteristics. We're also getting rid of legacy behaviors and protocols that we deprecated as
+part of Appium 2.
+
+For you as a user, there's not much to worry about. The breaking changes are minimal:
+
+- Node.js / NPM minimum version bump (to 20.19 / 10)
+- Removal of certain deprecated endpoints
+- Security feature flag prefix requirements (e.g. `adb_shell` to `uiautomator2:adb_shell`)
+
+In terms of new features, we've been adding them incrementally rather than saving them up for
+Appium 3. But with this release we are excited to share these new capabilities:
+
+- `appium plugin install inspector` (Use Appium to host the Inspector rather than downloading it as a separate app)
+- Clients can set the `X-Appium-Is-Sensitive` HTTP header on requests to direct the server to mask the data in the request in the logs, so that when you send a password into an input box, the password's actual value is not logged in plaintext. ([Learn more](../../developing/sensitive.md))
+
+Of course, we have a full [Appium 3 migration guide](../../guides/migrating-2-to-3.md) to make sure
+you know all the details and can deeply understand the consequences of upgrading to Appium 3 in
+your environment.
+
+---
+
+**Ready to make the leap?** Appium 3 is a great step forward in creating more secure, maintainable,
+and W3C-compliant test automation pipelines. Happy testing!

packages/appium/docs/ja/guides/migrating-2-to-3.md

@@ -13,6 +13,16 @@ title: Appium 3 へ移行する
 
 Appium 2 はAppiumアーキテクチャ全体の大きな見直しをしました。 Appium 3 は限られた破壊的変更のみの比較的小さな更新であり、移行プロセスがはるかに簡易になります。
 
+## Installation
+
+The installation method for Appium 3 remains the same as for Appium 2. If you want to upgrade, you
+can simply install Appium 3 on top of your existing installation:
+
+```bash
+# optional: `appium setup reset`
+npm install -g appium
+```
+
 \## 破壊的変更
 
 ### Node 20+ Required

packages/appium/docs/zh/blog/posts/appium3.md

@@ -0,0 +1,40 @@
+---
+authors:
+  - sai
+  - srini
+  - jlipps
+date: 2025-08-07
+---
+
+# 🚀 Appium 3
+
+Appium 3 is here — and while it's not as massive a leap as Appium 2, it introduces a few essential
+breaking changes that developers and QA engineers should be aware of.
+
+<!-- more -->
+
+The main idea behind Appium 3 is to clear out old cruft so that Appium can be leaner moving
+forward, and rely on newer versions of software with better performance and security
+characteristics. We're also getting rid of legacy behaviors and protocols that we deprecated as
+part of Appium 2.
+
+For you as a user, there's not much to worry about. The breaking changes are minimal:
+
+- Node.js / NPM minimum version bump (to 20.19 / 10)
+- Removal of certain deprecated endpoints
+- Security feature flag prefix requirements (e.g. `adb_shell` to `uiautomator2:adb_shell`)
+
+In terms of new features, we've been adding them incrementally rather than saving them up for
+Appium 3. But with this release we are excited to share these new capabilities:
+
+- `appium plugin install inspector` (Use Appium to host the Inspector rather than downloading it as a separate app)
+- Clients can set the `X-Appium-Is-Sensitive` HTTP header on requests to direct the server to mask the data in the request in the logs, so that when you send a password into an input box, the password's actual value is not logged in plaintext. ([Learn more](../../developing/sensitive.md))
+
+Of course, we have a full [Appium 3 migration guide](../../guides/migrating-2-to-3.md) to make sure
+you know all the details and can deeply understand the consequences of upgrading to Appium 3 in
+your environment.
+
+---
+
+**Ready to make the leap?** Appium 3 is a great step forward in creating more secure, maintainable,
+and W3C-compliant test automation pipelines. Happy testing!

packages/appium/docs/zh/guides/migrating-2-to-3.md

@@ -14,6 +14,16 @@ It contains a list of breaking changes, as well as suggestions for handling them
 While Appium 2 was a major overhaul of the entire Appium architecture, Appium 3 is a smaller
 upgrade with fewer breaking changes, which should result in a much simpler migration process.
 
+## Installation
+
+The installation method for Appium 3 remains the same as for Appium 2. If you want to upgrade, you
+can simply install Appium 3 on top of your existing installation:
+
+```bash
+# optional: `appium setup reset`
+npm install -g appium
+```
+
 \## Breaking Changes
 
 ### Node 20+ Required