Earn Tokens on Welcome page is not translated in Polish locale

[btlechowski]

Follow up to #13437

Steps to Reproduce

1. Clean profile
2. Run Brave in Polish (PL) locale
3. On Welcome UI (brave://welcome), open Rewards onboarding

Note: it is translated in German locale

Actual result:

Earn Tokens on Welcome page is not translated
Polish

Expected result:

Earn Tokens on Welcome page is translated

Reproduces how often:

Easily reproduced

Brave version (brave://version info)

Brave	1.19.85 Chromium: 88.0.4324.89 (Official Build) (64-bit)
Revision	4534be84786f5269fb52e9bf82643af61e2fedaf-refs/branch-heads/4324@{#1721}
OS	Ubuntu 18.04 LTS

Version/Channel Information:

• Can you reproduce this issue with the current release? yes
• Can you reproduce this issue with the beta channel? yes
• Can you reproduce this issue with the nightly channel? yes

cc @mkarolin @brave/legacy_qa @rebron

[mkarolin]

@btlechowski, it appears to have been missed because of the formatting of the string:

<ph name=\"BEGIN_BOLD\">$1</ph>Earn tokens<ph name=\"END_BOLD\">$2</ph> poprzez oglądanie Brave Private Ads oraz automatyczne wspieranie twórców treści.

We have a similar string without formatting where Earn tokens was translated as Zarabiaj tokeny. If I use that, does the sentence below make sense?

Zarabiaj tokeny poprzez oglądanie Brave Private Ads oraz automatyczne wspieranie twórców treści.

[btlechowski]

@mkarolin Zarabiaj tokeny is the right translations and fits the sentence.

Also the text in Polish suggests that you can earn tokens by automatically supporting the content creators. I think we need to make the text in English more obvious so that the translators won't get confused. I will log another issue.

[mkarolin]

@btlechowski, the other string is translated as: Zarabiaj tokeny, oglądając reklamy z poszanowaniem prywatności i automatycznie wspieraj ulubione strony oraz twórców treści. Is this a more precise translation?

[GeetaSarvadnya]

Verification passed on

Brave | 1.19.87 Chromium: 88.0.4324.96 (Oficjalna wersja) (64-bitowa)
-- | --
Wersja | 68dba2d8a0b149a1d3afac56fa74648032bcf46b-refs/branch-heads/4324@{#1784}
System operacyjny | Windows 10 OS Version 2004 (Build 19041.746)

• Verified the STR from the description
  

---

Verified passed with

Brave	1.19.87 Chromium: 88.0.4324.96 (Oficjalna wersja) (x86_64)
Wersja	68dba2d8a0b149a1d3afac56fa74648032bcf46b-refs/branch-heads/4324@{#1784}
System operacyjny	macOS Wersja 10.15.7 (kompilacja 19H15)

Verified STR from description.

Confirmed issue exists in 1.19.86, does not exist in 1.19.87.

1.19.86	1.19.87

---

Verification passed on

Brave	1.19.87 Chromium: 88.0.4324.96 (Official Build) (64-bit)
Revision	68dba2d8a0b149a1d3afac56fa74648032bcf46b-refs/branch-heads/4324@{#1784}
OS	Ubuntu 18.04 LTS

Verified test plan from the description