Custom text isn't translated

[srirambv]

Description

Follow up to #6289. Custom text implemented as part of #6485 isn't translated

Steps to Reproduce

1. Install component 0.1.17
2. Set device locale to French
3. Disclosure message isn't translated
4. Choose a type to set up: text isn't translated
5. Back button text isn't translated on create/restore wallet pages
6. Password info message on create/restore wallet pages aren't translated

Actual result:

Dislosure message

Choose a type to set up:

Back & password info message on create page

Back & password info message on restore page

Expected result:

All custom text should be translated

Reproduces how often:

Easy

Brave version (brave://version info)

Brave	0.69.135 Chromium: 77.0.3865.120 (Official Build) (64-bit)
Revision	416d6d8013e9adb6dd33b0c12e7614ff403d1a94-refs/branch-heads/3865@{#884}
OS	Linux

Ethereum component version 0.1.17

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 dev channel? Yes
• Can you reproduce this issue with the nightly channel? Yes

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields?
• Does the issue resolve itself when disabling Brave Rewards?
• Is the issue reproducible on the latest version of Chrome?

Miscellaneous Information: