from docx import Document
word_to_find = "chuka"
 
def highlight_word_in_tables(doc, word_to_find):
    for table in doc.tables:
        for row in table.rows:
            for cell in row.cells:
                for paragraph in cell.paragraphs:
                    if word_to_find in paragraph.text:
                        for run in paragraph.runs:
                            if word_to_find in run.text:
                                run.font.highlight_color = 7