[i18n] replace hardcoded english strings with i18n

[Bamieh]

There are a few obvious places we have in Kibana that are missing i18n. This issue does not include everything missing; The goal of this issue is to make sure we have decent coverage in each main user flow, landing page, welcome screen, date pickers, sidenave, topnav, etc.

Preparations:

• Spin a 8.2 test cluster to identify missing i18n (French and pseudo english)
• Receive the latest translation files for testing
• Define some of the main user flows to test coverage against
• Manually go over the main screens of every domain and make sure we are not missing any translations

Missing i18n

• Privacy policy message on the welcome screen
• Sidenav group headers
• Datepicker (needs to be fixed from EUI's side: [EuiSuperDatePicker] Ensure i18n coverage eui#5398)
• Sidenav top level groups (Home, analytics, etc)
• Dashboard creation page Create dashboard button (https://github.com/elastic/sdh-kibana/issues/2706)
• Enterprise Search description on the home page (screenshot (below)[https://github.com/[i18n] replace hardcoded english strings with i18n #127705#issuecomment-1087777579])

Notes

Why are we manually testing coverage?

Unfortunately, we don't have any tooling around testing i18n coverage at the moment. I've opened an issue to discuss supporting frontend coverage to at least have some guarantees on the frontend #127708

Why not aim to have full i18n coverage?

We have 120k+ words in kibana and checking for coverage manually as a diminishing return on time invested. Since we do not have an automated tool to ensure a minimum level of coverage, the level of coverage will keep fluctuating between releases so it is impossible.

Some labels are internationalized but still in English?

1. The French extraction was 6 months ago so there is a big gap in coverage that will automatically be addressed upon the 8.2 extraction.
2. Services and brand names like Canvas, Kibana, Elasticsearch, etc are intentionally left in English by translators. We do not have a list of keywords that we keep in English but I refer to the elastic.co website to see which keywords are not translated when I get asked.
3. It could be a possible bug. Our i18n package is using the old react context which sometimes bugs out. Please surface those bugs so we can fix them since detecting those is tricky and purely manual until we upgrade the intl package ([i18n] React-Intl v3 soon out of beta #38642)

[elasticmachine]

Pinging @elastic/kibana-core (Team:Core)

[alexfrancoeur]

An early snapshot was spun up with French enabled and it looks like the Enterprise Search description on the home page is not translated. Adding here to track as we work through the 8.2 translation.

[Bamieh]

I will keep this issue open until 8.2 GA to allow more feedback until the next extraction in May. After this issue is closed I will create another issue for 8.x to have a place for people to submit hardcoded strings for the teams to update.

I'm fighting with the exalate-issue-sync to keep this open since I linked it to a resolved task 🙃

[rseldner]

A user has graciously provided a list of Japanese translations. Based on Kibana 8.1.0.

		default	i18n.locale: "ja-JP"
No.	location	string	current string	desired string	note
1	home title	Welcome home	ようこそホーム	ようこそ	"ようこそホーム" is strange as Japanse
2	home menu	Home	Home	ホーム
3	home menu	Analytics	Analytics	分析
4	home menu	Discover	Discover	探索
5	home menu	Dashboard	Dashboard	ダッシュボード
6	home menu	Canvas	Canvas	キャンバス
7	home menu	Graph	Graph	グラフ
8	home menu	Visualize Library	Visualize Library	ビジュアライゼーションライブラリ
9	Visualize Library title	Visualize Library	Visualizeライブラリ	ビジュアライゼーションライブラリ
10	Visualize Library create button	Create visualization	Createビジュアライゼーション	ビジュアライゼーションを作成
11	New visuazlization	aggregation	アグリゲーション	集約	"aggragation" is translated  as "集約" in another place
12	time filter	last	last	過去
13	time filter	next	next	今後
14	time filter	seconds	seconds	秒間
15	time filter	minutes	minutes	分間
16	time filter	hours	hours	時間
17	time filter	days	days	日間
18	time filter	weeks	weeks	週間
19	time filter	months	months	か月間
20	time filter	years	years	年間
21	time filter	Refresh every	以下の感覚ごとに更新	以下の間隔ごとに更新
22	visualization	Inspect	検査	詳細を見る	Japanese '検査' is similar to 'test'.
23	filter operator	is	is	等しい
24	filter operator	is not	is not	等しくない
25	filter operator	is one of	is one of	いずれか
26	filter operator	is not one of	is not one of	いずれでもない
27	filter operator	is between	is between	範囲内
28	filter operator	is not between	is not between	範囲外
29	dashboard	Create dashboard	Createダッシュボード	ダッシュボードを作成
30	home -> spaces	spaces	spaces	スペース
31	dashboard list	Search...	Search...	検索...
32	dashboard list	Rows per page	Rows per page	ページごとの行数
33	Visualize Library list	Search...	Search...	検索...
34	Canvas	Canvas	Canvas	キャンバス
35	Canvas	Add your first workpad	初の’ワークパッドを追加しましょう	初のワークパッドを追加しましょう	Unnecessary "’"
36	Canvas template	Search...	Search...	検索...
37	Canvas template	Rows per page	Rows per page	ページごとの行数
38	Canvas list	Rows per page	Rows per page	ページごとの行数
39	Discover -> Inspect	Inspector	インスペクター	詳細
40	Discover -> Inspect	Request	Request	リクエスト

[Bamieh]

Thank you @rseldner

[Bamieh]

Closing this as resolved. If we need another run of testing we'd open a new issue