 Here is a basic structure of the Python script using `argparse` for command line arguments and `pysil` for working with UFO files. Please note that this is a simplified version and might need further adjustments based on your specific requirements.

```python
import argparse
import csv
from pysil import UFO, Glyph, Font
from lxml import etree

parser = argparse.ArgumentParser()
parser.add_argument('ufo', help='Input UFO file')
parser.add_argument('csv', help='Glyph data CSV file')
parser.add_argument('output', help='Output FTML file')
parser.add_argument('--font_code', help='Font code')
parser.add_argument('--log', help='Log file name')
parser.add_argument('--languages', nargs='+', help='BCP47 language tags')
parser.add_argument('--rtl', action='store_true', help='Enable right-to-left feature')
parser.add_argument('--no_render', action='store_true', help='Disable rendering check')
parser.add_argument('--test_name', help='Test name')
parser.add_argument('--font_source', help='Font source')
parser.add_argument('--text_scaling', type=float, help='Text scaling')
parser.add_argument('--anchor_regex', help='Anchor points regular expression')
parser.add_argument('--total_width', type=float, help='Total width of all string column')
parser.add_argument('--xsl', help='XSL stylesheet')

args = parser.parse_args()

# Initialize FTML document
ftml_doc = etree.Element("fonttest", version="1.0")

# Read glyph data from CSV
with open(args.csv, newline='') as csvfile:
    reader = csv.DictReader(csvfile)
    for row in reader:
        glyph_name = row['glyph']
        g = UFO(args.ufo).getGlyph(glyph_name)

        # Add encoded characters, unencoded specials and ligatures, Lam-Alef data, and diacritic attachment data
        # (This part requires more specific implementation based on your data structure)

        # Create a new FTML test
        test = etree.SubElement(ftml_doc, "test", name=args.test_name)
        test_info = etree.SubElement(test, "info")
        etree.SubElement(test_info, "font-family").text = g.font.familyName
        etree.SubElement(test_info, "font-style").text = g.font.styleName
        etree.SubElement(test_info, "font-weight").text = str(g.font.weight)
        etree.SubElement(test_info, "font-stretch").text = g.font.stretchName
        etree.SubElement(test_info, "font-variant").text = g.font.variantName
        etree.SubElement(test_info, "font-size").text = str(args.text_scaling * g.bbox.height)

        # Add language tags
        for language in args.languages:
            etree.SubElement(test, "lang", xml:lang=language)

        # Add glyph data
        glyph = etree.SubElement(test, "glyph", unicode=row['unicode'])
        if args.rtl:
            etree.SubElement(glyph, "rtl").text = "true"
        if not args.no_render:
            etree.SubElement(glyph, "hhea").text = str(g.hhea.ascender)
            etree.SubElement(glyph, "vmtx").text = str(g.vmtx.yMax)
        if args.anchor_regex:
            anchor_points = [(point.x, point.y) for point in g.anchors if re.match(args.anchor_regex, point.name)]
            anchor_point = etree.SubElement(glyph, "anchor")
            anchor_point.set("id", anchor_points[0][0])
            anchor_point.set("y", str(anchor_points[0][1]))
        if args.total_width:
            glyph.set("width", str(args.total_width))

# Save the FTML document
etree.ElementTree(ftml_doc).write(args.output, xml_declaration=True, encoding='utf-8', pretty_print=True)
```

This script reads the command line arguments, initializes an FTML document, reads glyph data from a CSV file, and adds the glyphs to the FTML document based on the provided arguments. The script then saves the FTML document to the specified output file. You may need to adjust the script to fit your specific needs, such as handling different data structures, regular expressions, and XSL stylesheets.