Merge #3877

3877: Update Japanese translation r=def- a=TsFreddie

plus some fixes of Chinese strings that my friend found out while doing japanese translation

## Checklist

- [ ] Tested the change ingame
- [ ] Provided screenshots if it is a visual change
- [ ] Tested in combination with possibly related configuration options
- [ ] Written a unit test if it works standalone, system.c especially
- [ ] Considered possible null pointers and out of bounds array indexing
- [ ] Changed no physics that affect existing maps
- [ ] Tested the change with [ASan+UBSan or valgrind's memcheck](https://github.com/ddnet/ddnet/#using-addresssanitizer--undefinedbehavioursanitizer-or-valgrinds-memcheck) (optional)


Co-authored-by: Freddie Wang <tsfreddiewang@gmail.com>

data/languages/simplified_chinese.txt

@@ -346,7 +346,7 @@ Pistol
 
 [Demo browser]
 Play
-== 编辑器
+== 播放
 
 Play background music
 == 播放背景音乐
@@ -364,7 +364,7 @@ Player options
 == 玩家选项
 
 Players
-== 玩家数
+== 玩家
 
 Please balance teams!
 == 队伍人数不平衡！
@@ -867,7 +867,7 @@ Frags
 == 击杀数
 
 Enable long pain sound (used when shooting in freeze)
-== 启用长时间痛苦的声音(在冻结时使用)
+== 启用冻结呼救声
 
 %.2f MiB
 == %.2f MiB
@@ -964,7 +964,7 @@ Downloading %s:
 == 正在下载 %s:
 
 %d new mentions
-== %d 条新提示
+== %d 条新提及
 
 Toggle dummy
 == 切换分身
@@ -994,7 +994,7 @@ Zoom in
 == 视野放大
 
 1 new mention
-== 1 条新提示
+== 1 条新提及
 
 Update failed! Check log...
 == 更新失败！请检查日志...
@@ -1024,7 +1024,7 @@ Dummy copy
 == 分身同步动作
 
 9+ new mentions
-== 9+ 条新提示
+== 9+ 条新提及
 
 Statboard
 == 统计板

data/languages/traditional_chinese.txt

@@ -357,7 +357,7 @@ Player options
 == 玩家選項
 
 Players
-== 玩家數
+== 玩家
 
 Please balance teams!
 == 隊伍人數不平衡！
@@ -860,7 +860,7 @@ Frags
 == 擊殺數
 
 Enable long pain sound (used when shooting in freeze)
-== 啟用長時間痛苦的聲音(在凍結時使用)
+== 啟用在凍結時的呼救聲
 
 %.2f MiB
 == %.2f MiB
@@ -869,7 +869,7 @@ Refresh Rate
 == 重新整理率
 
 New random timeout code
-== 新隨機超時程式碼
+== 隨機生成新的超時還原碼
 
 Suicides
 == 自殺數
@@ -957,7 +957,7 @@ Downloading %s:
 == 正在下載 %s:
 
 %d new mentions
-== %d 條新提示
+== %d 條新提及
 
 Toggle dummy
 == 切換分身
@@ -987,7 +987,7 @@ Zoom in
 == 視距放大
 
 1 new mention
-== 1 條新提示
+== 1 條新提及
 
 Update failed! Check log...
 == 更新失敗！請檢查日誌...
@@ -1017,7 +1017,7 @@ Dummy copy
 == 分身同步動作
 
 9+ new mentions
-== 9+ 條新提示
+== 9+ 條新提及
 
 Statboard
 == 統計板