IssueTracker

Description: I am encountering an issue where translating HTML content from left-to-right (LTR) languages to right-to-left (RTL) languages using the @google-cloud/translate package results in duplicate text-align styles within the style attribute. This occurs when the original HTML already contains a text-align style, and the translation process adds another text-align style.

Steps to Reproduce:

1. Start with the following English HTML content:

<section style="background:#f5f5f5;margin:1em 0;border-radius:1em;">
    <div class="positive text-right" style="display:block;minWidth:40px;width:20%;height:100%;border-radius:1em;size:0; color:#fff;text-align:end !important;padding: 0 .3em;">
        200%
    </div>
</section>

2. Translate the HTML content to Arabic (or any other RTL language) using @google-cloud/translate.
3. Observe the resulting HTML content:

<section style="background:#f5f5f5;margin:1em 0;border-radius:1em;">
    <div class="positive text-right" style="display:block;minWidth:40px;width:20%;height:100%;border-radius:1em;size:0; color:#fff;text-align:end !important;padding: 0 .3em;; text-align:right;direction:rtl">
        200%
    </div>
</section>

Expected Behavior: The resulting HTML content should not contain duplicate text-align styles. The expected translated HTML should be:

<section style="background:#f5f5f5;margin:1em 0;border-radius:1em;">
    <div class="positive text-right" style="display:block;minWidth:40px;width:20%;height:100%;border-radius:1em;size:0; color:#fff;text-align:right;padding: 0 .3em;direction:rtl">
        200%
    </div>
</section>

Actual Behavior:

The translated HTML contains duplicate text-align styles:

<section style="background:#f5f5f5;margin:1em 0;border-radius:1em;">
    <div class="positive text-right" style="display:block;minWidth:40px;width:20%;height:100%;border-radius:1em;size:0; color:#fff;text-align:end !important;padding: 0 .3em;; text-align:right;direction:rtl">
        200%
    </div>
</section>

Environment: which product (packages/*): @google-cloud/translate OS: Windows 11 Pro Node.js version: 16.13.2 google-cloud-node version: 1.1.0

Thank you for your time and consideration.