If you want to add some new custom changes, you need to add a new custom php file for that page in themes/functions/ folder with name custom_tpl_articles.php

1) {$article_default_heading} - To display the page heading of  articles  page
The data of this can be change by changing the value of define HEADING_TITLE in articles.php language file.

2) {$articles_upcoming} – To display upcoming articles, if the shop have.

3) {$current_articles_heading} – To display the heading for current articles.
The data of this can be change by changing the value of define TEXT_CURRENT_ARTICLES_TOP in articles.php language file.

4) {$no_article_text} – To display the text if there is no current article.
The data of this can be change by changing the value of define TEXT_NO_ARTICLES in articles.php language file.

5) {$all_article_text} – To display the text for current articles .
The data of this can be change by changing the value of define TEXT_ALL_ARTICLES in articles.php language file.

6) {$current_article_text} – To display all the current articles.

7) {$article_search_link_text} – To display the link for article search page.

8) {$article_prev_next_bar_text} –To display the text regarding the page result.