Split multiple columns into rows at once

I have a table that has 37 columns. each column needs to be split in to rows. If I did that to one by one it is a big mess. I need a code to apply to make it all at once. Here is a sample of the table

I need to see it as

index    Programming languages    Integrated development environments etc..

1          python                                   jupyter

1           null                                        Rstudio

10        R                                            Rstudio

10        SQL                                        Vm/Emacs

10        Juilia                                      null

10        Bash                                        null

I have tried this code:

= List.Accumulate(
Table.ColumnNames(Source),
Source,
(st, cur) =>
if List.AnyTrue(List.Transform(Table.Column(st, cur), each Text.Contains(_, ";")))
then Table.SplitColumn(st, cur, Splitter.SplitTextByDelimiter(";", QuoteStyle.Csv), 6)
else st
)

But it split them in to columns not rows 

I need help as soon as possible