Why csquotes does not seem to be persistent?

Question

Using the \hyphenblockcquote like in What's the advantage of using csquotes over using an editor's auto-replacement for "? seems (for a bloody beginner) not persistent. Inside the same section (another subsection, see below) the 'blockquote' changes into a kind of USenglish 'style'.

\documentclass{article}

\usepackage[utf8]{inputenc} % for writing other that basic characters
\usepackage{graphicx}
\usepackage{caption}
\usepackage{subcaption}
\usepackage[UKenglish, USenglish]{babel}
\usepackage{csquotes} % blockquotation and other.
\usepackage{enumitem} % enumerate [1], [2],.. http://ctan.org/pkg/enumitem

% Include any extra LaTeX packages required
\usepackage[authoryear, numbers, comma, sort&compress]{natbib}  % Use the "Natbib" style for the
                                                                % references in the Bibliography

\usepackage{verbatim}  % Needed for the "comment" environment to make LaTeX comments
% \usepackage{vector}  % Allows "\bvec{}" and "\buvec{}" for "blackboard" style bold vectors in maths

    \begin{filecontents*}{\jobname.bib}

    @article{walton2012,
       author = {Walton, Douglas},
       title = {Using Argumentation Schemes for Argument Extraction: A Bottom-Up Method},
       journal = {Int. J. Cogn. Inform. Nat. Intell.},
       issue_date = {July 2012},
       year = {2012},
       }

    \end{filecontents*}

\begin{document}

\chapter{TeXperiments} % history of the jetpak

\section{Argumentation Theory}
\hyphenblockcquote{**UKenglish**}[p. 5]{emeren1996}{Argumentation is a verbal and social activity
of reason aimed at increasing (or decreasing) the acceptability of a controversial standpoint
for the listener or reader, by putting forward a constellation of propositions intended to
justify (or refute) the standpoint before a rational judge.}

\subsection{Walton's Argument Schemes}
Walton proposed the analysis of arguments with \textit{presumptive argumentation schemes}
\citep[p. 3]{walton1996}.

\hyphenblockcquote{**UKenglish**}[p. 34]{walton2012}{Argumentation schemes represent stereotypical
patterns of reasoning used in everyday conversational argumentation, as well as in a variety
of other contexts as well, [...] that aim at a decision on what to do in given circumstances.}


\end{document}

Answer 1

The package csquotes can be responsible for deciding when it is necessary to switch from an in-line quotation to a 'block' or 'display' format. For this to work, you need to use the quotation commands it provides that are designed to to this --- notably those commands that have block in their name:

• \blockquote
• \foreignblockquote
• \hyphenblockquote
• \hybridblockquote
• \blockcquote
• \foreignblockcquote
• \hyphenblockcquote
• \hybridblockcquote

Style guides tend to have their own views about how long a quotation needs to be before it must be a block quote, but csquotes defaults to threshold=3 and thresholdtype=lines, which means more than three lines of quotation will be set as a block quotation. You can change it to a word-threshold with thresholdtype=words (but then you probably don't want the threshold to be 3!).

Other important options to be aware of in this connection are:

• parthreshold (default: true): any quotation with an explicit paragraph or line break will trigger a block quotation; and
• csdisplay (default: false): by default, only inline quotations will be used in footnotes, parboxes, minipages, and floats.

And, of course, much of the default functionality is very customizable...